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Jeff Day

@jeffday.bsky.social
3.4K followers 624 following 5.9K posts

i like weird deep sea shit, particularly cephalopods. also metal, parasitic fungi, horror, etc. he/him, ace, adhd (maybe autistic?) opinions are mine and not my employer’s

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Jeff Day @jeffday.bsky.social · 05/10/2026
unfortunately this individual is lacking the unique tentacle this genus is known for youtu.be/boV-zXhWTAQ?...
youtu.be
Grimalditeuthis bonplandi: A deep-sea squid with tentacle tips that "swim" on their own
YouTube video by MBARI (Monterey Bay Aquarium Research Institute)
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Jeff Day @jeffday.bsky.social · 05/10/2026
very nice grimalditeuthis on @schmidtocean.bsky.social right now www.youtube.com/live/BgPqp4Q...
translucent squid viewed from the side.
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Lisa @tuexplorer1.bsky.social · 03/10/2026
Leachia @schmidtocean.bsky.social dive 964 #samplinggap #MarineLife
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Lisa @tuexplorer1.bsky.social · 03/10/2026
Promachoteuthis @schmidtocean.bsky.social dive 964 #samplinggap #MarineLife
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Jeff Day @jeffday.bsky.social · 03/10/2026
HOLY SHIT PROMACHOTEUTHIS ON @schmidtocean.bsky.social www.youtube.com/live/s1xbJG7...
a red squid with two very long, very thick, weirdly stringy tentacles
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Lisa @tuexplorer1.bsky.social · 02/10/2026
Face finger time! Enypniastes @schmidtocean.bsky.social dive 962 #samplinggap #MarineLife
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Lisa @tuexplorer1.bsky.social · 01/10/2026
Maybe Galiteuthis (will report back is squid squad says something else) @schmidtocean.bsky.social dive 962 #samplinggap #MarineLife
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Lisa @tuexplorer1.bsky.social · 01/10/2026
Another Galiteuthis @schmidtocean.bsky.social dive 962 #samplinggap #MarineLife
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Lisa @tuexplorer1.bsky.social · 01/10/2026
Planctoteuthis @schmidtocean.bsky.social dive 962 #samplinggap #MarineLife
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Lisa @tuexplorer1.bsky.social · 01/10/2026
Galiteuthis armata doing a spin @schmidtocean.bsky.social dive 962 #samplinggap #MarineLife
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Jeff Day @jeffday.bsky.social · 05/09/2026
hey google, compose me a 60-minute doom metal song about weed
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Jeff Day @jeffday.bsky.social · 02/09/2026
well that’s a hell of a way to kick off squidtember this is a cool observation, we don’t have a ton of east pacific magnapinna sightings
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Sarah McAnulty, Ph.D. @sarahmackattack.bsky.social · 01/09/2026
I've been seeing a lot of "well I guess this is the way things are now" "ah another line of evidence that we are a fallen empire", attitude that I am begging people to shake off. There are people working their butts off to make things better. Please don't give up. Join us.
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Jeff Day @jeffday.bsky.social · 26/08/2026
graneledone will scavenge mermaidfalls just as readily as whalefalls. the real interesting question is whether or not there are osedax worms specialized to mermaid corpses, as they are often specific to the animal they scavenge (no this is not real, i’m just riffing on one of eduardo’s works)
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Schmidt Ocean Institute @schmidtocean.bsky.social · 26/08/2026
A midweek montage from the July 2026 #DeepWonders expedition to Trinidad & Tobago w/ @divaamon.bsky.social. The team located over 25 active cold seeps, discovered 20 suspected new species, and mapped approximately 13% of the country’s marine territory.
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Jeff Day @jeffday.bsky.social · 26/08/2026
nm, found it @cageyratfish.bsky.social www.youtube.com/live/fPMAjx7...
youtube.com
Site 4D | SOI Divestream 951 - Part 2
YouTube video by Schmidt Ocean Institute
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Jeff Day @jeffday.bsky.social · 26/08/2026
ok, i thought it looked off - they did see an a. ferox too at one point, right?
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Jeff Day @jeffday.bsky.social · 26/08/2026
lisa, this paper wouldn't have happened without you. i might not have even discovered ROV livestreams without your tweets announcing each one. i definitely wouldn't have had the guts to email mike vecchione without seeing you interacting with @echinoblog.bsky.social and other scientists regularly!
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Jeff Day @jeffday.bsky.social · 26/08/2026
I’M AFRAID WE DON’T GET INTO THE MORPHOLOGICAL PECULIARITIES OF OUR NOODLY BOI, JUST DISTRIBUTION
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Jeff Day @jeffday.bsky.social · 26/08/2026
just kidding apparently i already did lol bsky.app/profile/tuex...
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Jeff Day @jeffday.bsky.social · 26/08/2026
thanks, kg!!! that reminds me, schmidt had a beautiful observation of an alepisaurus in the midwater i need to send you
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Jeff Day @jeffday.bsky.social · 19/08/2026
i finally get to say this: I've got a new paper out with @hadalbloke.bsky.social, Joao Corona (Magnapinna Archive), Yakup Niyazi, and Denise J Swanborn: link.springer.com/article/10.1...
link.springer.com
Global distribution and depth of the Bigfin squid Magnapinna spp - Marine Biology
The Bigfin squid Magnapinna spp. is elusive and rarely encountered, yet its charismatic morphology of large fins and extraordinarily long tentacle filaments makes it an instantly recognisable deep-sea...
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Jeff Day @jeffday.bsky.social · 14/08/2026
they mention that there have been 60-65 sightings during the observation - absolutely wild to realize those numbers are based on the list i compiled and added to wikipedia (have something more official forthcoming that just got accepted, stay tuned)
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Jeff Day @jeffday.bsky.social · 14/08/2026
here’s the official clip: youtu.be/LW1HCCm8f9g?...
youtu.be
TWO Bigfin Squid Sightings in Micronesia?! | Nautilus Live
YouTube video by EVNautilus
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Jeff Day @jeffday.bsky.social · 14/08/2026
been a great couple of months for magnapinna sightings. i need to update the list
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Lisa @tuexplorer1.bsky.social · 26/07/2026
I think that's Mastigoteuthis? Poor squid has been through some things with those ripped off arms and tentacles @schmidtocean.bsky.social dive 959 #deepwonders
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Jeff Day @jeffday.bsky.social · 14/08/2026
'Who would plant a medieval rodent-themed doom metal band in the industry and be like, 'You know what's really gonna make us money? This rodent-themed medieval doom metal band.'
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Jeff Day @jeffday.bsky.social · 14/08/2026
as shit as spotify is, i have to give credit, as i found out about the previous two bands from its recommendations. also castle rat, whom i will forever adore due to riley pinkerton’s response to them being an industry plant loudwire.com/castle-rat-r...
loudwire.com
'It's Hilarious and a Compliment' - Castle Rat's Riley Pinkerton Laughs Off 'Industry Plant' Talk
The very DIY nature of Castle Rat would seemingly discredit the idea of being an 'industry plant.'
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Jeff Day @jeffday.bsky.social · 14/08/2026
liar is immense: creaturess.bandcamp.com/track/liar jo delivers a portion of the lyrics in this primal, gut-wrenching shriek toward the middle of the song. it gives me goddamn chills.
creaturess.bandcamp.com
Liar, by Creaturess
from the album Creaturess
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Jeff Day @jeffday.bsky.social · 14/08/2026
oldest sea is also fantastic: oldestsea1.bandcamp.com
oldestsea1.bandcamp.com
Oldest Sea
Ethereal Heaviness from NJ
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Jeff Day @jeffday.bsky.social · 14/08/2026
on the music front, i’ve been really enjoying creaturess lately:
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Jeff Day @jeffday.bsky.social · 14/08/2026
i’m gonna have to side with danna, while i am of course a Squid Guy, and if you’ve never seen imagery of them “flying” you absolutely need to look it up immediately, ommastrephes is by far not the coolest option here.
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George Matsumoto @georgeimatsumoto.bsky.social · 14/08/2026
@montereybayaquarium.org thanking local residents with limited free admission in Sept - more details here - www.montereybayaquarium.org/visit/schedu...
montereybayaquarium.org
Free admission for Monterey County residents
Monterey County residents can enjoy free admission to the Aquarium Sept. 8–20, 2026!
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Xeni Flowers | Horse Destroyer @xeniflowers.com · 13/08/2026
You can get prints and posters for 25% off! One of the best ways to support me as an independent artist! ▶️ SHOP #art #DarkArt #horror #BSNM #ArtShop
Digital greyscale ink drawing that uses lots of fine lines and hatching. A portrait of a zombie horse from the neck up. Its decayed, mostly skeletal mouth is open and its ear is perked up. Its neck is torn open, revealing bands of muscle underneath. Its dark mane flows in movement.
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Lisa @tuexplorer1.bsky.social · 20/07/2026
Vamproteuthis @schmidtocean.bsky.social dive 953 #deepwonders #MarineLife
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Jeff Day @jeffday.bsky.social · 12/08/2026
i don’t know much offhand about vampyroteuthis vision tbh, i’m not sure how much it’s been studied. i’ll check the literature
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Andrew D Thaler @drandrewthaler.bsky.social · 24/07/2026
Do you want a beautiful, free, 500-page guide to marine Isopods? Yes. Yes, you do. museumsvictoria.com.au/collections-...
museumsvictoria.com.au
Marine Crustacea Isopoda: guide to families and genera of the world | Collections & research | Museums Victoria
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Jeff Day @jeffday.bsky.social · 12/08/2026
i don’t think they can given the number of individuals i’ve seen with missing/partial arms or tentacles. maybe octopoteuthis can given that it can shed arms as a defense strategy, i’ll have to look it up
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Jeff Day @jeffday.bsky.social · 06/07/2026
ah sweet ty for the correction. thats 2 from SOI, one from SERPENT, MBARI has... 2? im assuming theres some JAMSTEC observations in there somewhere
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Jeff Day @jeffday.bsky.social · 06/07/2026
i think they've been observed in situ something like only 4 or 5 times? with the first observation literally being within the last decade: bioone.org/journals/cop...
bioone.org
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Jeff Day @jeffday.bsky.social · 06/07/2026
the real crazy part about this observation is the pair of gigantura (telescopefish) in the back:
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Lisa @tuexplorer1.bsky.social · 05/07/2026
Chiroteuthis doing stuff I haven't seen them do before @schmidtocean.bsky.social dive 939 #deepwonders #MarineLife
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Lisa @tuexplorer1.bsky.social · 05/07/2026
Neolithodes 🦀? @schmidtocean.bsky.social dive 939 #deepwonders #MarineLife
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Lisa @tuexplorer1.bsky.social · 05/07/2026
Whoa, check out that Chimaera!! Not a species I've seen on a dive before. @schmidtocean.bsky.social dive 939 #deepwonders #MarineLife
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Lisa @tuexplorer1.bsky.social · 06/07/2026
Opisthoteuthis! @schmidtocean.bsky.social dive 939 #deepwonders #MarineLife
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Lisa @tuexplorer1.bsky.social · 06/07/2026
Shrimp, pycnogonid, tiny hermit crab beside zoanthid covered sponge stalk, & not sure what that coral is attached to. Urchin test maybe? @schmidtocean.bsky.social dive 939 #deepwonders #MarineLife
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Lisa @tuexplorer1.bsky.social · 06/07/2026
Apristurus! Love the dead shape on this shark @schmidtocean.bsky.social dive 939 #deepwonders #MarineLife
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Lisa @tuexplorer1.bsky.social · 06/07/2026
OMG look at this fishfall!! Big ole ray. That's a 1st for me! @schmidtocean.bsky.social dive 939 part 2 #deepwonders #MarineLife
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Schmidt Ocean Institute @schmidtocean.bsky.social · 29/06/2026
An addition to the "Awesomely Peculiar Hall of Fame" — extremely rare sighting of a barreleye fish, & first footage of this species, Winteria telescopa, alive in situ. Filmed during the #Doldrums expedition at 710 m. Read more about tubular eyes & a light organ here: youtube.com/shorts/1bhh3...
youtube.com
A barreleye fish with binocular vision & a sole!
YouTube video by Schmidt Ocean Institute
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Schmidt Ocean Institute @schmidtocean.bsky.social · 30/06/2026
🚨Not one, but two Magnapinna squid! 🚨 the #doldrums team observed 2 elusive Magnapinna sp., commonly known as bigfin squid, at approximately 4,300 m (about 2.7 miles). Magnapinna is the deepest-dwelling squid. Sightings of these animals are extremely rare — seeing two in one dive is extra exciting!
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