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Dr. Karly E. Cohen

@karlycohen.bsky.social
1.1K followers 392 following 41 posts

Postdoc and lecturer at University of Washington Friday Harbors Labs looking at the tools organisms use to interact with the world |She/Her www.karlye-cohen.com

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Reposted by Dr. Karly E. Cohen
Dr. Jaimi Gray @jaimiagray.bsky.social · 18/05/2026
The Pacific spiny lumpsucker, an inefficient swimmer but a highly efficient suction cup. The pelvic fins have evolved into a strong suction disk on the belly, giving it the ability to anchor itself to substrates. Plate-like structures called "tubercles" provide defense against predators.
A 3D model made from a micro-CT scan of a Pacific spiny lumpsucker, with the skeleton rendered in light brown/beige and the tubercles rendered in a gradient of colors, beginning with pink at the head, and changing from purple, to blue, to teal as you move towards the tail. Outline of the body is rendered in white and transparent. Shown in antero-lateral view (top), anterior view (bottom left), and left lateral view of the head (bottom right). Scale bar at the bottom right is 5 mm.A 3D model made from a micro-CT scan of a Pacific spiny lumpsucker, with the skeleton rendered in light brown/beige and the tubercles rendered in a gradient of colors, beginning with pink at the head, and changing from purple, to blue, to teal as you move towards the tail. Outline of the body is rendered in white and transparent. Shown in dorsal view (top), right lateral view (middle), and ventral view (bottom). Scale bar at the bottom left is 10 mm.
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Dr. Jaimi Gray @jaimiagray.bsky.social · 18/05/2026
Bonus content 🐡: jaimigray.github.io/lumpsucker-v... play with the model using an online 3D viewer I built. Special thanks to my bud @karlycohen.bsky.social for catching this little lady straight out of Friday Harbor 🩵
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Dr. Karly E. Cohen @karlycohen.bsky.social · 06/02/2026
Priority deadline (Feb 16) for this years Fish Class at Friday Harbor is coming up quick! Get your applications in for what will be an amazing summer filled with great science, people, and tools! Financial aid is available!! @cmdonatelli.bsky.social @fishguy.bsky.social @karlycohen.bsky.social
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Dr. Karly E. Cohen @karlycohen.bsky.social · 12/01/2026
Summer fish class at Friday Harbor Labs 🐟 5 weeks, field + lab, real projects. Open to grads, postdocs, and undergrads. Financial aid available. Apply: February 16, 2026 Reach out to @cmdonatelli.bsky.social @fishguy.bsky.social or @karlycohen.bsky.social with questions! Details in the flyer ⬇️
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Reposted by Dr. Karly E. Cohen
Todd Clardy @realfishdoc.bsky.social · 12/01/2026
There are a few courses that shaped the trajectory of my career. This is one of them. Take it if you can!
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William B. Ludt, PhD @planet-of-fishes.bsky.social · 12/01/2026
Fun opportunity for early career individuals at Friday Harbor Labs. Everyone I know who has taken or been involved in this course has a great time. Highly recommend.
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Jonathan Huie, PhD @jmhuie.bsky.social · 12/01/2026
Early students must take this!!
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Dr. Karly E. Cohen @karlycohen.bsky.social · 12/01/2026
Summer fish class at Friday Harbor Labs 🐟 5 weeks, field + lab, real projects. Open to grads, postdocs, and undergrads. Financial aid available. Apply: February 16, 2026 Reach out to @cmdonatelli.bsky.social @fishguy.bsky.social or @karlycohen.bsky.social with questions! Details in the flyer ⬇️
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Reposted by Dr. Karly E. Cohen
SICB journals @sicbjournals.bsky.social · 22/12/2025
Have you read ICB's issue 6 yet? with Applied #ecoimmunology in #wildlife health and #conservation & authors @schulzscience.bsky.social @karlycohen.bsky.social Cohen @thomsanger.bsky.social Sanger @cmdonatelli.bsky.social Donatelli Stacy Farina and more! academic.oup.com/icb/issue/65/6
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Dr. Karly E. Cohen @karlycohen.bsky.social · 10/10/2025
Check out this really fun interview I got to work on with Mitch Borden on one of my favorite fish, the spiny lumpsucker! www.knkx.org/science/2025...
knkx.org
Toothy armor, suction cups: Pacific spiny lumpsuckers persevere in Puget Sound
The small, clumsy fish isn’t the strongest or fastest creature living in Puget Sound. But it has developed other tools to survive in rough waters.
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Dr. Karly E. Cohen @karlycohen.bsky.social · 10/10/2025
Check out this really fun interview I got to work on with Mitch Borden on one of my favorite fish, the spiny lumpsucker! www.knkx.org/science/2025...
knkx.org
Toothy armor, suction cups: Pacific spiny lumpsuckers persevere in Puget Sound
The small, clumsy fish isn’t the strongest or fastest creature living in Puget Sound. But it has developed other tools to survive in rough waters.
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Reposted by Dr. Karly E. Cohen
Seema Sheth @seemasheth.bsky.social · 26/09/2025
NSF GRFP solicitation is finally up. Life Sci deadline extended to Nov 10 but 2nd year grad students no longer eligible www.nsf.gov/funding/oppo...
nsf.gov
NSF Graduate Research Fellowship Program (GRFP)
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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 06/09/2025
Behold the Gloriously Weird Spotted Ratfish. It Has Teeth on Its Forehead for Sex
scientificamerican.com
Behold the Gloriously Weird Spotted Ratfish. It Has Teeth on Its Forehead for Sex
Researchers have finally traced the origin of the spotted ratfish’s bizarre forehead teeth, which are used for mating
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UW News @uwnews.uw.edu · 05/09/2025
New findings call into question one of the core assumptions about teeth. Adult male spotted ratfish have rows of teeth on top of their heads, in addition to those in their jaws. They use these teeth to grip females while mating. @karlycohen.bsky.social More: www.washington.edu/news/2025/09...
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Chris Goatley @chrisgoatley.bsky.social · 04/09/2025
New species alert! A Pascua goby from the Coral Sea. This genus now contains four species. Two from the Eastern Pacific and two from Australia, with more than 5,500km separating them. Lots of fun describing my second new species. #TeamFish #Fish doi.org/10.3390/fish...
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Kate Wong @katewong.bsky.social · 04/09/2025
Behold the gloriously weird Spotted Ratfish. It has teeth on its forehead for sex. The teeth line a cartilaginous appendage called a tenaculum that in males can be erected and used to grasp a female during mating 🧪
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John P. Friel, Ph.D. @friel.bsky.social · 04/09/2025
Bumping to the Fishes! and Science feeds🐟🧪
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Gareth Fraser @garethjfraser.bsky.social · 04/09/2025
Super excited to share our new paper, out today @pnas.org 'Teeth outside the jaw: Evolution and development of the toothed head clasper in chimaeras' @karlycohen.bsky.social 👻🦈 🦷 www.pnas.org/doi/10.1073/...
pnas.org
Teeth outside the jaw: Evolution and development of the toothed head clasper in chimaeras | PNAS
Chimaeras (Holocephali) are an understudied group of mostly deep-ocean cartilaginous fishes (Chondrichthyes) with unique characteristics that disti...
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Emily Troyer @fishfetisher.bsky.social · 04/09/2025
Super cool!! What a weird fish #TeamFish
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Adam Summers @fishguy.bsky.social · 04/09/2025
Coolest fish is a ratfish and they have teeth on the head for mating. @karlycohen.bsky.social's most recent with a great Ray Troll piece of art. 🧪🐡 www.washington.edu/news/2025/09...
Ray Troll reconstruction of a fossil chimera. CT scan of a spotted ratfish chimera.
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Dr. Karly E. Cohen @karlycohen.bsky.social · 04/09/2025
Article link here! www.pnas.org/doi/10.1073/...
pnas.org
Teeth outside the jaw: Evolution and development of the toothed head clasper in chimaeras | PNAS
Chimaeras (Holocephali) are an understudied group of mostly deep-ocean cartilaginous fishes (Chondrichthyes) with unique characteristics that disti...
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Dr. Karly E. Cohen @karlycohen.bsky.social · 04/09/2025
New paper is officially out! Ratfish have a second jaw on their foreheads - CT + histology show they’re real teeth, built from the same tissues and signals as oral teeth. www.washington.edu/news/2025/09...
washington.edu
This common fish has an uncommon feature: forehead teeth, used for mating
New findings call into question one of the core assumptions about teeth. Adult male spotted ratfish, a shark-like species native to the eastern Pacific Ocean, have rows of teeth on top of their heads,...
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Dr. Karly E. Cohen @karlycohen.bsky.social · 10/07/2025
The incredible @shirel.bsky.social fills the room tonight for the FHL teaching us about how manta rays feed
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Jonathan Huie, PhD @jmhuie.bsky.social · 27/06/2025
Of course there would be no paper w/o my co-authors @fishyologist.bsky.social, Allyson Evans, Thaddaeus Buser, @calliehcrawford.bsky.social, @emilykane.bsky.social, and Matt Kolmann. HUGE thanks to NSF for funding, @fishguy.bsky.social for the FHL fish class, & Scripps and OSU for their fish.
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Jonathan Huie, PhD @jmhuie.bsky.social · 27/06/2025
One reason I love this project is because of how many different tools and techniques we used. Field collections, high-speed feeding videos, CT scans of the jaw bones and muscles, scanning electron micrographs of the teeth, and lip histology....truly a tour de force of fun science.
Digital 3D rendering of the head of Clinocottus globiceps. The jaw closing muscles are shown in red.Scanning electron micrographs of the teeth and jaws of five sculpin species showing that Clinocottus globiceps and C. recalvus have blade like teeth rather than conesExample of the thick lip in Clinocottus globiceps, shown with histological sectioning
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Jonathan Huie, PhD @jmhuie.bsky.social · 27/06/2025
New fish paper! We found that Clinocottus globicpes eats anemones (weird!) using a novel wrestling behavior + strong jaws that likely started as adaptations for tearing algae. It also has thick skin that protects it from stinging cells. @jzoology.bsky.social 🐟🧪 DM for PDF. doi.org/10.1111/jzo....
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Jonathan Huie, PhD @jmhuie.bsky.social · 27/06/2025
How could I forget to tag @karlycohen.bsky.social!!!
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Adam Summers @fishguy.bsky.social · 27/05/2025
Hey look! Glowing fishes evolved over and over again. Lots of color of glow. @emilycarr.bsky.social led a team that included 5 FHL folks @jmhuie.bsky.social @lampichthys.bsky.social and @karlycohen.bsky.social. The oldest glowy fish is an eel at 100MYA. 🧪 www.nature.com/articles/s41...
nature.com
Repeated and widespread evolution of biofluorescence in marine fishes - Nature Communications
Biofluorescence is widespread in fishes. Here, the authors compile data on biofluorescence presence across teleost fishes and demonstrate that it may have originally evolved in eels 112 million years ...
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Dr. Karly E. Cohen @karlycohen.bsky.social · 27/05/2025
So excited to see this paper out! @jmhuie.bsky.social and I began looking at glowing fishes during the pandemic. @emilycarr.bsky.social turned it into amazing science! A great story about the evolution of glow www.nature.com/articles/s41...
nature.com
Repeated and widespread evolution of biofluorescence in marine fishes - Nature Communications
Biofluorescence is widespread in fishes. Here, the authors compile data on biofluorescence presence across teleost fishes and demonstrate that it may have originally evolved in eels 112 million years ...
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Reposted by Dr. Karly E. Cohen
Adam Summers @fishguy.bsky.social · 16/04/2025
Jack Rosen's paper on biting fruits and seeds is out in @royalsocietypublishing.org Interface. 3D models of pacu and piranha jaws cutting different prey. Pacus are 'better' at fruit. Maybe eating seeds drove the evolution of frugivory from piscivory. 🧪 royalsocietypublishing.org/doi/10.1098/...
Four panel figure. A lateral CT scan of a frugivorous fish CT scan with an inset showing the jaws in frontal view. A 3D printed model of the upper and lower teeth opposing each other. The 3D printed models mounted in a materials testing system to allow food to be bitten. The load displacement curve that results from biting fruit in with the model jows.
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Dr. Jaimi Gray @jaimiagray.bsky.social · 11/02/2025
@aineander.bsky.social: talented scientific artist with a kind soul! April runs the UChicago PaleoCT lab. Her beautiful work in scientific illustration/visualization helps researchers translate complex scientific concepts to visual media such as illustration, animation, & 3D prints aprilneander.com
aprilneander.com
Scientific Illustration – April Neander
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Dr. Jaimi Gray @jaimiagray.bsky.social · 11/02/2025
@stephanopteryx.bsky.social: studier of bird bones/anatomy and all round great person! Stephanie's current postdoc at UF involves 3D imaging the anatomy of bird lungs. Her previous PhD work on water bird wing shapes is available here: doi.org/10.1093/iob/...
doi.org
Wing Shape in Waterbirds: Morphometric Patterns Associated with Behavior, Habitat, Migration, and Phylogenetic Convergence
Synopsis. Wing shape plays a critical role in flight function in birds and other powered fliers and has been shown to be correlated with flight performance
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Dr. Jaimi Gray @jaimiagray.bsky.social · 11/02/2025
@mariacavallejo.bsky.social: A paleoherpetologist dedicated to old dead frogs. She is extremely smart, kind, & fun! She recently finished her PhD uncovering the stories fossil frogs have to tell, and won an award from the UF Biology Department for best student paper: doi.org/10.1093/zool...
doi.org
Fossil frogs (Eleutherodactylidae: Eleutherodactylus) from Florida suggest overwater dispersal from the Caribbean by the Late Oligocene
Abstract. Establishment of extant terrestrial vertebrate faunas in North America was influenced by a set of factors associated with temporal changes in cli
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Dr. Jaimi Gray @jaimiagray.bsky.social · 11/02/2025
@leaveylab.bsky.social: evolutionary biologist with a go-get-em attitude, I'm yet to see a task she wasn't willing to conquer. I worked w Alice on #diceCT frog legs, & now she's shining in her postdoc on chameleons! She's been busy publishing her PhD research: onlinelibrary.wiley.com/doi/10.1002/...
onlinelibrary.wiley.com
Frog Fibres: What Muscle Architecture Can Tell Us About Anuran Locomotor Function
Our study utilises a new, automated approach to digitally extracting muscle fibres from μCT data, allowing us to present the first digital analysis of muscle fibre architecture in frogs, including so...
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Dr. Jaimi Gray @jaimiagray.bsky.social · 11/02/2025
Happy 💕International Day of Girls and Women in Science💕 I'd like to highlight a couple of the women who inspire me! See thread ⬇️
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Adam Summers @fishguy.bsky.social · 16/01/2025
Our REU summer program just went live. Here is the application form... etap.nsf.gov/award/499/op... And here are the project descriptions... fhl.uw.edu/research/sum... There is a short time line on this. Please pass it to any interested undergrads.
etap.nsf.gov
NSF Education & Training Application | ETAP
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Cassandra Donatelli @cmdonatelli.bsky.social · 05/01/2025
Bringing in the whole team to figure out what armor is. @fishguy.bsky.social @schulzscience.bsky.social @karlycohen.bsky.social and Misty Paig-Tran who isn't here in BlueSky?
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Cassandra Donatelli @cmdonatelli.bsky.social · 05/01/2025
If you are looking for armor diversity this is the talk to be at! @karlycohen.bsky.social is now showing is armor shape and material diversity in armadillos. #SICBioinspired #SICB2025
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Cassandra Donatelli @cmdonatelli.bsky.social · 05/01/2025
Thanks to everyone who participated in our #SICBioinspired symposium today! @karlycohen.bsky.social and I had so much fun hearing from all of you. Thanks also to @biologists.bsky.social and @anatomyorg.bsky.social and @sicbjournals.bsky.social for supporting everyone here today! #SICB2025
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SICB journals @sicbjournals.bsky.social · 05/01/2025
#SICB2025 BIMS(Black In Marine Science ) & ICB collaborated on the first ever BIMS issue featuring: free to read The Joy Factor: Redefining Leadership Excellence at Black in Marine #Science through Joy-Centered Leadership Practices By Lynnette Adams, Tiara Moore, doi.org/10.1093/icb/... & more
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Andrew K. Schulz, Ph.D. @schulzscience.bsky.social · 05/01/2025
Talk number 2 is up at 2:00pm in Marquis C. If you love knitting or elephants you should stop by! #SICB2025
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Cassandra Donatelli @cmdonatelli.bsky.social · 05/01/2025
We are back for our afternoon session! Come join us this afternoon in Marquis C for some more awesome #SICBioinspired talks! #SICB2025
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Dr. Karly E. Cohen @karlycohen.bsky.social · 05/01/2025
Now Astrid Layton gets students working on bioinspired design in engineering spaces. #SICB2025 #SICBbioinspired @sicbjournals.bsky.social
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Dr. Karly E. Cohen @karlycohen.bsky.social · 05/01/2025
Happening now! Form, function, and mechanics of composites! @schulzscience.bsky.social #SICB2025 #SICBbioinspired @sicbjournals.bsky.social
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Dr. Karly E. Cohen @karlycohen.bsky.social · 05/01/2025
Happening now! Form, function, and mechanics of composites! @schulzscience.bsky.social #SICB2025 #SICBbioinspired @sicbjournals.bsky.social
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Dr. Karly E. Cohen @karlycohen.bsky.social · 05/01/2025
Next we have @schulzscience.bsky.social starting at 2 PM in Marquis C! If you are looking at the paper program this is a schedule change you don't want to miss! #SICB2025 #SICBioinspired @sicbjournals.bsky.social
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Dr. Karly E. Cohen @karlycohen.bsky.social · 05/01/2025
We are starting back up again strong with Brian Woronowicz talking about tail movement and function in rats
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Dr. Karly E. Cohen @karlycohen.bsky.social · 05/01/2025
We are starting back up again strong with Brian Woronowicz talking about tail movement and function in rats
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Dr. Karly E. Cohen @karlycohen.bsky.social · 05/01/2025
Jessica presents us a framework to help find the colleagues to answer your questions! Aiding conversations across the fields of biology and engineering
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Dr. Karly E. Cohen @karlycohen.bsky.social · 05/01/2025
How we ask think about our questions has major impacts on the kinds of data we collect and share
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