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AT EVERY DEPTH: Our Growing Knowledge of the Changing Oceans

@ateverydepth.bsky.social
282 followers 79 following 125 posts

Tessa Hill (@tessahill.bsky.social) and Eric Simons (@ericsimons.bsky.social) explore human ties to the ocean — from coral reefs to the Arctic. Published by @columbiaup.bsky.social.

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AT EVERY DEPTH: Our Growing Knowledge of the Changing Oceans @ateverydepth.bsky.social · 22/06/2025
In a world that can feel a bit overwhelming with bad news... At Every Depth is here to bring you stories of how people are working together to protect our watery planet. Pre-order the paperback at @columbiauniversitypress (discount code CUP20) or from your favorite independent bookseller.
A person sits on a beach under an umbrella with a copy of At Every Depth. Photo by J. Foley
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AT EVERY DEPTH: Our Growing Knowledge of the Changing Oceans @ateverydepth.bsky.social · 13/06/2025
Thank you to Paul Hormick in the latest Green Dispatch for this roundup of #oceanacidification news and a plug for At Every Depth! greendispatch.substack.com/p/ocean-acid...
greendispatch.substack.com
Ocean acidification passes planetary boundary
The CO2 we emit to the atmosphere also affects the world's oceans
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UN Environment Programme @unep.org · 11/06/2025
The ocean shields coasts, sustains biodiversity, and feeds billions. While leaders pledged to protect 30% of it by 2030, only 8.4% is protected today. We need real action that protects people and planet: www.unep.org/events/confe... #UNOC3
A split-panel visual showing the main threats to the ocean. From left to right: tangled fishing nets (overfishing), a polar bear on melting ice (climate change), a plastic bag floating underwater (pollution), and bleached coral (habitat loss). Bold text at the bottom reads: “THE OCEAN IS IN CRISIS.” UN Environment Programme logo appears in the top right.
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Euronews @euronews.com · 09/06/2025
UN Secretary General Antonio Guterres urged world leaders to ratify the treaty, warning that fishing, plastic pollution and rising sea temperatures were destroying ocean ecosystems.
l.euronews.com
UN urges countries to ratify landmark High Seas Treaty
UN Secretary General Antonio Guterres urged world leaders to ratify the treaty, warning that fishing, plastic pollution and rising sea temperatures were destroying ocean ecosystems.
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AT EVERY DEPTH: Our Growing Knowledge of the Changing Oceans @ateverydepth.bsky.social · 23/05/2025
If you've read At Every Depth, you know we love @whiteabalone.bsky.social. The story of the white abalone program encapsulates the entire sense of the book itself: that we can face daunting challenges by working together. The program is now under threat. www.pressdemocrat.com/article/news...
pressdemocrat.com
They brought a species back from the brink in Bodega Bay — now federal cuts may undo it all
A groundbreaking program to rescue endangered white abalone at the UC Davis Bodega Marine Lab is now at risk, as proposed federal budget cuts threaten to end the funding that made the species’ comebac...
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AT EVERY DEPTH: Our Growing Knowledge of the Changing Oceans @ateverydepth.bsky.social · 17/04/2025
"This book is for those with an interest in our ocean, our planet, and the changes we are rapidly facing. It reads much more like a story than any sort of scientific text, thanks to its people-focused approach..." @aimeeeem.bsky.social for @hnetreviews.bsky.social networks.h-net.org/group/review...
networks.h-net.org
Mook on Hill and Simons, 'At Every Depth: Our Growing Knowledge of the Changing Oceans' | H-Net
Hill, Tessa; Simons, Eric. At Every Depth: Our Growing Knowledge of the Changing Oceans. : Columbia University Press, 2024. ix + 268 pp. $32.95 (cloth), ISBN 9780231199704. Reviewed by Aimee Mook (Nat...
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AT EVERY DEPTH: Our Growing Knowledge of the Changing Oceans @ateverydepth.bsky.social · 17/04/2025
Just in time for #earthday : Listen in on this podcast with @ateverydepth.bsky.social author Tessa Hill, as @climateone.org explores the future of fishing - and unveils some great ocean news stories! 🎣🐟🌊🌎
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AT EVERY DEPTH: Our Growing Knowledge of the Changing Oceans @ateverydepth.bsky.social · 17/04/2025
We are loving this review by MI Book Reviews! They noted "My only critique of the book is there were not enough sharks." 😹 We acknowledge this weakness of the book... 🦈 Next book: more sharks. 🦈 🦈
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AT EVERY DEPTH: Our Growing Knowledge of the Changing Oceans @ateverydepth.bsky.social · 31/03/2025
📣 Exciting announcement! At Every Depth will be released in paperback this summer!! 📣 Preorders will start mid June. Purchase from your local bookshop, or buy from Columbia University Press (use discount code CUP20 for a 20% discount on paperback or hardcover). cup.columbia.edu/book/at-ever...
cup.columbia.edu
At Every Depth | Columbia University Press
Winner, 2024 Choice Outstanding Academic TitleThe world’s oceans are changing at a drastic pace. Beneath the waves and along the coasts, climate change and... | CUP
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Tessa Hill @tessahill.bsky.social · 24/03/2025
Received a thank you card after a recent event for @ateverydepth.bsky.social and it’s just so perfect! Starting monday with a beautiful illustration by @rachelignotofsky.bsky.social and wise words by Rachel Carson:
Illustration of Rachel Carson with cool things swirling around her - jellyfish, birds, turtles. She is holding binoculars and a water sample and a field notebook. Quote below her reads: 

“The human race is challenged more than ever before to demonstrate our mastery, not over nature but of ourselves.”
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AT EVERY DEPTH: Our Growing Knowledge of the Changing Oceans @ateverydepth.bsky.social · 14/03/2025
The last few weeks have been busy for At Every Depth, w/ presentations at Bowdoin College, Citizens Climate Lobby, Rotary Clubs & more. Each time, we encourage a community conversation about our connection to the ocean and what we will do to preserve it. Stay strong, ocean lovers.
media.tenor.com
the sun is setting over the ocean and waves are crashing on the beach
Alt: the sun is setting over the ocean and waves are crashing on the beach
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AT EVERY DEPTH: Our Growing Knowledge of the Changing Oceans @ateverydepth.bsky.social · 14/03/2025
Thank you to Ocean Literacy UNESCO for featuring @ateverydepth.bsky.social in their "Ultimate List of Must Read Ocean Books" ! See original post on insta: www.instagram.com/p/DG2wGzisu9X/
A blue circle on top of an ocean/coastal background, with a line drawing of an open book. Text reads: The ultimate list of must-read Ocean books. Save to refer back to.
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Tessa Hill @tessahill.bsky.social · 08/03/2025
Speaking with a Citizen’s Climate Lobby chapter this morning about coasts, climate change, policy action and @ateverydepth.bsky.social, and …. then dashing off to my kid’s track meet, which seems like a generally good encapsulation of life right now. 📈 🏃
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AT EVERY DEPTH: Our Growing Knowledge of the Changing Oceans @ateverydepth.bsky.social · 04/02/2025
"Whether it is climate change, other types of pollution, sustainable management of the deep sea, or a myriad of other concerns, every step that we take today toward protecting our planet improves our collective future." cupblog.org/2025/01/28/t...
cupblog.org
Tessa Hill on At Every Depth - Columbia University Press Blog
Beneath the waves and along the coasts of the world’s oceans, climate change and environmental degradation have spurred the most radical transformations in human history. In At Every Depth, the oceano...
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AT EVERY DEPTH: Our Growing Knowledge of the Changing Oceans @ateverydepth.bsky.social · 04/02/2025
In the midst of a lot of stressful news, enjoy this video produced by high school student Sara Kong about the challenge of ocean acidification - featuring @ateverydepth.bsky.social author @tessahill.bsky.social along with a suite of other experts and policymakers. www.youtube.com/watch?v=5ARo...
youtube.com
Ocean Acidification: Small Changes, Big Problems
YouTube video by S Kong
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AT EVERY DEPTH: Our Growing Knowledge of the Changing Oceans @ateverydepth.bsky.social · 27/01/2025
We are loving @thestorygraph.com - a great place to track your reading, and leave book reviews! Some of our favorite book reviewers are already active on there ( @intertidalkendy.bsky.social )! Please leave a review for @ateverydepth.bsky.social if you are willing!
This is a book review on the StoryGraph site. Intertidalkendy's review of At Every Depth starts with: 5 stars. This book has found itself on the top of my list of favorite ocean books. Wow! Phenomenal read.
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AT EVERY DEPTH: Our Growing Knowledge of the Changing Oceans @ateverydepth.bsky.social · 20/01/2025
One of the top stories from @ucdavis in 2024 was The Problem With Microplastics - highlighting how pervasive the problem is with plastic pollution in our everyday lives. Learn more here, and in AT EVERY DEPTH!
ucdavis.edu
The Problem with Microplastics
While photos of littered beaches and floating garbage patches are unsettling, perhaps the most problematic plastic is barely visible to the naked eye. Called microplastics — chunks less than 5 millime...
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AT EVERY DEPTH: Our Growing Knowledge of the Changing Oceans @ateverydepth.bsky.social · 20/01/2025
Looking forward to many opportunities to talk with you in 2025 about your connection to the ocean and what you are doing to keep that connection strong. We have a range of events lined up for AT EVERY DEPTH and we'd love to hear from you if you have an event idea! www.ateverydepth.com/events
Photo shows from L to R: Terry Sawyer, co-founder of Hog Island Oyster Company, Tessa Hill, and Eric Simons, at our book launch event in Tomales Bay in April 2025. Photo credit: K. Watenpaugh
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Earthjustice @earthjustice.org · 06/01/2025
In his final weeks in office, President Biden protected 625 million acres of vulnerable areas of the ocean from oil and gas drilling — in a way that incoming president-elect Donald Trump can't easily undo.
earthjustice.org
President Biden Permanently Protects Vulnerable Areas of the Ocean from Oil and Gas Drilling
The president used a federal law to ban future oil and gas drilling in parts of the Atlantic, Pacific, Alaska, and the Gulf of Mexico.
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Tessa Hill @tessahill.bsky.social · 06/01/2025
In the announcement, the Biden administration acknowledged that one of the motivations for this action was lessons learned from the Deepwater Horizon oil spill - something we discuss extensively in @ateverydepth.bsky.social.
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AT EVERY DEPTH: Our Growing Knowledge of the Changing Oceans @ateverydepth.bsky.social · 05/01/2025
"Our earth and climate science books emphasize sustainability: we seek solutions-oriented books for practitioners, decision-makers, and concerned general readers that lead the way toward a healthier future." cup.columbia.edu/science
cup.columbia.edu
Science | Columbia University Press
Meet Our Editor Miranda Martin Life Sciences; Physical Sciences If you would like to submit a book to Columbia University Press, please send a proposal containing a brief description of the content an...
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AT EVERY DEPTH: Our Growing Knowledge of the Changing Oceans @ateverydepth.bsky.social · 30/12/2024
"Most Rapt Audience: This month, former longtime BN editor Eric Simons and Tessa Hill’s tales of reporting their book about the science of the changing ocean kept the audience on the call and asking questions till the very end." @baynatureinstitute.bsky.social baynature.org/2024/12/23/b...
baynature.org
Bay Nature's Most Popular Stories in 2024 -
By sheer numbers, we could probably justify making Bay Nature a wholly coyote-themed publication.
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AT EVERY DEPTH: Our Growing Knowledge of the Changing Oceans @ateverydepth.bsky.social · 23/12/2024
"This year brought essential reading on climate change, endangered species, ecology, environmental justice, and other important topics about protecting the planet." Including AT EVERY DEPTH! therevelator.org/environmenta...
therevelator.org
Revelator Reads Bonus: 280+ Environmental Books Published in 2024 • The Revelator
This year brought essential reading on climate change, endangered species, ecology, environmental justice, and other important topics about protecting the planet.
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AT EVERY DEPTH: Our Growing Knowledge of the Changing Oceans @ateverydepth.bsky.social · 18/12/2024
Save 20% on AT EVERY DEPTH!
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Colin Schultz @colinschultz.bsky.social · 18/12/2024
I didn't know if Hakai would be around when the next deep-sea mining news peg rolled around, so please accept this forward-looking examination by @eshirin.bsky.social, where she answers: What's next for deep-sea mining? hakaimagazine.com/news/whats-n...
hakaimagazine.com
What’s Next for Deep-Sea Mining? | Hakai Magazine
With mining applications on the horizon, the International Seabed Authority’s crucial Mining Code is still far from finished.
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Dr Michelle LaRue @drmichellelarue.bsky.social · 15/12/2024
The #penguinpicoftheday #PPOTD is from last year right around this time when I was at Atka Bay with the emperor penguins there. This colony moved substantially in the couple of weeks I was there. 🧪🦉🦑🌎
A bright sunny day in Antarctica with emperor penguins as far as you can see in the distance with white snow in the foreground
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Yale Climate Connections @climateconnections.bsky.social · 03/12/2024
New to Bluesky? Get fact-based climate and weather news with this starter pack of Yale Climate Connections contributors: go.bsky.app/LybCW7s
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AT EVERY DEPTH: Our Growing Knowledge of the Changing Oceans @ateverydepth.bsky.social · 11/12/2024
Lots of upcoming events to learn more about AT EVERY DEPTH. We hope you'll join in, or contact us for an event near you!
Text on a background of a dark ocean: AT EVERY DEPTH Winter 24/25 Events: 

December 11 - Bay Nature Webinar

January 24 - UC Santa Cruz

February 24-25 Bowdoin College

March 6 - 28 - multiple events in Northern CA: Davis, Santa Rosa, Bodega and more
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AT EVERY DEPTH: Our Growing Knowledge of the Changing Oceans @ateverydepth.bsky.social · 09/12/2024
Did you love AT EVERY DEPTH? Perhaps consider leaving a review on your favorite book review platform. Reviews guide other readers towards the book, and may even help the book land in someone's holiday gift basket! Thank you!
Community Reviews from Good Reads: 4.46 stars
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AT EVERY DEPTH: Our Growing Knowledge of the Changing Oceans @ateverydepth.bsky.social · 04/12/2024
Thank you to @katharinehayhoe.com for pointing this out, and thank you to blueskyroast.com for this AI generated glowing recommendation of our content (ha!)
The Ocean's Own Social Media Influences
Tessa Hill and Eric Simons dive deep into ocean stories with a splash of personality. Flipping through their posts is like swimming through a coral reef - colorful, surprising, and occasionally filled with features that could use a little less sunlight. What is on your mind? - Top Topics
Ocean Conservation 95% (with a cute description)
Educational Workshops 85% (same)
Personal Reflections 80% (same)
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AT EVERY DEPTH: Our Growing Knowledge of the Changing Oceans @ateverydepth.bsky.social · 03/12/2024
Join At Every Depth authors Tessa Hill and Eric Simons for a Bay Nature talk - registration is free, and the discussion is via zoom, on Dec 11. Hope to see you there! baynature.app.neoncrm.com/np/clients/b...
photograph of the cover of Bay Nature Magazine. With the background of a big crashing ocean wave, the cover introduces THE OCEAN ISSUE
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Tessa Hill @tessahill.bsky.social · 02/12/2024
I love this 💕 My ocean optimism class (2018?) was one of the inspirations for writing @ateverydepth.bsky.social !
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AT EVERY DEPTH: Our Growing Knowledge of the Changing Oceans @ateverydepth.bsky.social · 03/12/2024
Yesterday was Antarctica Day! One of our favorite stories from Antarctica is one we feature in At Every Depth: The discovery of Shackleton's Endurance ship, complete with an ecosystem of deep sea creatures. www.bbc.com/news/science...
bbc.com
Endurance: Shackleton's lost ship is found in Antarctic
What was one of the world's greatest undiscovered shipwrecks is identified on the Antarctic seafloor.
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Prof Michael Meredith 🌊🧪🥼❄️ @oceanandice.bsky.social · 01/12/2024
Antarctica Day is on Dec 1st each year. It marks the signing of the Antarctic Treaty, which sets aside Antarctica as a continent for peace and science. To help celebrate, here’s a photo I took a couple of years ago, of a seal which had clearly got the message about peace. Happy #AntarcticaDay!!
A seal snoozing in the sunshine on some ice.
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Nikolay Koldunov @oceanographer.bsky.social · 01/12/2024
To celebrate Antarctica Day, here is an image of winds around Antarctica as simulated by a 4 km resolution atmospheric model. 🧪 Model: IFS-FESOM | Shown: U component of wind | Project: nextGEMS #SciArt
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Matt Bracken @brackenlab.bsky.social · 22/11/2024
Our UC Irvine students are creative & amazing! And the book we’re reading is inspiring! #AtEveryDepth
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Tessa Hill @tessahill.bsky.social · 22/11/2024
Ok, I’m loving the starter packs! This one is for women (inclusively defined) in Ocean Science. You need more ocean 🌊 in your feed! Follow these folks. If you would like to be added please just let me know 👋 … if I forgot you, please don’t be offended, it was an accident! go.bsky.app/7MdiLgo
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AT EVERY DEPTH: Our Growing Knowledge of the Changing Oceans @ateverydepth.bsky.social · 21/11/2024
At a recent discussion led by students at UC Irvine, At Every Depth readers built origami catamaran canoes while chatting about Pacific voyaging. We are so inspired by this art-science integration and discussion of the history of voyaging. #ArtandScience #PacificVoyaging
A copy of At Every Depth in the foreground on a black table. On the table, folded paper catamarans.Folded paper catamarans and red Silo cups on a black table. In the background, a screen with a slide that reads: Hokule'a: What notions/myths do these chapters seek to dispel? Do they do so effectively?
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Michele Tobias, PhD @micheletobias.bsky.social · 18/11/2024
"The World Is Losing Its Sandy Beaches. Here's What We Can Do to Save Them" by Dr. Karen Martin Note that beach armoring (sea walls, etc.) don't protect the beach. We need beaches for so many reasons. www.realclearscience.com/articles/202...
realclearscience.com
The World Is Losing Its Sandy Beaches. Here's What We Can Do to Save Them
Sandy beaches are beloved recreational settings, and they are also one of the world’s most endangered ecosystems. Up to 70% of California’s beaches may disappear by the end of this century
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Tessa Hill @tessahill.bsky.social · 20/11/2024
I’ve set up a starter pack of folks writing about the ocean - in books, blogs, magazines, or similar. Follow along for great ocean storytelling (and let me know if you are an ocean writer that can be added!) 🌊 ✏️ 💻 go.bsky.app/L5XSEjW
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AT EVERY DEPTH: Our Growing Knowledge of the Changing Oceans @ateverydepth.bsky.social · 18/11/2024
Spotted at Book Shop Santa Cruz - we are loving the company we keep on this table of books! Tessa will be in Santa Cruz in January, hoping to sign some books while there!
the book At Every Depth on a table with other books at a bookshop, including Hidden Potential, Rebels, and Stolen Pride
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AT EVERY DEPTH: Our Growing Knowledge of the Changing Oceans @ateverydepth.bsky.social · 09/11/2024
The background context of writing At Every Depth was in fact the first Trump administration, and the few years following. Almost every person we interviewed for the book was speaking from a place of seeing science, communities, and the ocean impacted by the administration. (1/4)
A line drawing of the underside of an octopus, tentacles extended. It is beautiful and intricate. Drawing by Kaitlyn Kraybill-Voth.
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Dr Michelle LaRue @drmichellelarue.bsky.social · 24/09/2024
I love how different Weddell seal pups are, in size, color, and sass even 🧪🌍🦑🦊
Weddell seal pup chewing on its flippersWeddell seal pup leaning on mom, looking right at the cameraWeddell seal pup yelling at mom, mouth wide open
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AT EVERY DEPTH: Our Growing Knowledge of the Changing Oceans @ateverydepth.bsky.social · 31/10/2024
Talking with University of the Pacific students today, about @ateverydepth.bsky.social and storytelling in science.
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AT EVERY DEPTH: Our Growing Knowledge of the Changing Oceans @ateverydepth.bsky.social · 25/10/2024
Wait it’s #nationalmarinesanctuaryday !! We do love Marine Sanctuaries and feature several of them in the book, including Flower Garden Banks, Monterey Bay, Greater Farallones and more. #AtEveryDepth #OceanStories marinesanctuary.org/national-mar...
marinesanctuary.org
National Marine Sanctuary Day - October 23, 2023
Celebrate National Marine Sanctuary Day by supporting our sanctuaries.
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Andrew D Thaler @drandrewthaler.bsky.social · 21/10/2024
Alrighty. It was a big lift with a lot of keyword review, but the new and improved Ocean Commotion is ready to roll: bsky.app/profile/did:... Capturing all the conversations happening on Bluesky about the ocean, how it is changing, and how we can save it. Currently 200 keywords and counting.
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AT EVERY DEPTH: Our Growing Knowledge of the Changing Oceans @ateverydepth.bsky.social · 22/10/2024
An @ateverydepth.bsky.social sighting on board the Research Vessel Sikuliaq, on an expedition last week on the Oregon Coast. #oceanography #oceanbooks #sikuliaq photo: J. Fehrenbacher
The book At Every Depth sitting on a wooden desk, with a computer mouse, cords, and papers stacked nearby.
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Tessa Hill @tessahill.bsky.social · 09/10/2024
Just spent 2 days at Oregon State University w/ meetings, meals, & multiple discussions/events on @ateverydepth.bsky.social All of those discussions involved acknowledging the progress we are making on ocean/climate issues & also the losses we collectively feel on this rapidly changing planet.
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Tessa Hill @tessahill.bsky.social · 03/10/2024
In a presentation to the Institute of International and European Affairs today, I was asked a great question: if we stopped emitting carbon dioxide today, how long is the “lag” before the climate system responds? Here is a great answer to this question (hint: decades) www.climate.gov/news-feature...
climate.gov
Can we slow or even reverse global warming?
While we cannot stop global warming overnight, or even over the next several decades, we can slow the rate and limit the amount of global warming by reducing human emissions of heat-trapping gases and...
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Monterey Bay Aquarium @montereybayaquarium.org · 30/09/2024
Paws for a moment to check your voter registration. Remember, otters can’t vote for the ocean, but you shore can! Check your registration status and pledge to vote at VoteForTheOcean.org!
Sea otter Ruby looks off to the left while floating on her back with her paws out of the water
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