Hey y’all 👋 repost magic appreciated. The Solecki lab is recruiting multiple postdocs at St. Jude for a chromatin imaging project at the edge of live-cell imaging, neuronal cell biology, chromatin regulation, and quantitative image analysis. Ever dreamed of touring chromatin like this? We CAN 🔥

Love this paper on maybe my favorite group of fishes, the ponyfishes (Leiognathidae) Morphology of the light-organ system and bioluminescent blinking in the ponyfish tribe Equulitini (Teleostei: Leiognathidae) Ghedotti et al. 2026 #oa journals.plos.org/plosone/arti...

Morphology of the light-organ system and bioluminescent blinking in the ponyfish tribe Equulitini (Teleostei: Leiognathidae)

Ponyfishes in the Family Leiognathidae uniquely possess a complex bioluminescent system with an esophageal light-producing organ containing bioluminescent bacterial symbionts, a reflective gas bladder...

journals.plos.org

Ray-finned fishes are famously diverse, but we know little about their brains or cranial endocasts. @rodrigoichthys.bsky.social opens this black box with a dice-CT survey of 86 species across the actinopt tree of life. #OA in @royalsocietypublishing.org 🐟🧠 royalsocietypublishing.org/rspb/article...

Check out this amazing SHARK image! The most exquisite CT scan by @ellanicklin.bsky.social w/ @floridamuseum.bsky.social The entire body of a hatchling Californian Horn Shark (Heterodontus francisci); showing the early spread of skin teeth of different shape and size, w/ huge fin spines! 🦈😍

The teeth of the Californian Horn #shark (Heterodontus francisci) are incredible - this CT image by @ellanicklin.bsky.social shows the first rows of the juvenile dentition. How scary can this shark be when it has jazz-hands for teeth!? 🦈🦷 @ufresearch.bsky.social 👐

The metamorphic transition of the frog mouth: from tadpole keratinized mouthparts to adult teeth: royalsocietypublishing.org/doi/10.1098/... @garethjfraser.bsky.social @danpaluh.bsky.social #evolution

Our latest: Investigating the morphogenesis and replacement of lamprey toothlets using synchrotron imaging, led by Madleen Grohganz @bristolpalaeo.bsky.social, just out in Journal of Morphology. onlinelibrary.wiley.com/doi/epdf/10....

Do you like cichlids? Fossils? Fossil cichlids? Would you like to study them as part of a graduate degree at the University of Michigan, joining an NSF-funded project? Get in touch.

Last week I had my mind blown by the tenaculum, a fleshy club-like appendage growing out of a male ghost shark's forehead. The structure is studded with teeth and used to keep females close during mating. Latest for @nytimes.com explores the structure's evolution: www.nytimes.com/2025/09/06/s...

Get to Know the Ratfish and the Forehead Teeth It Uses During Sex

nytimes.com

Excellent article on our latest ghost shark forehead "jaw" paper @pnas.org; written by @jack-tamisiea.bsky.social @nytimes.com - "Get to Know the Ratfish and the Forehead Teeth It Uses During Sex" 👻🦈🦷 @karlycohen.bsky.social @ufresearch.bsky.social www.nytimes.com/2025/09/06/s...

Get to Know the Ratfish and the Forehead Teeth It Uses During Sex

nytimes.com

New preprint from some of my postdoc work on lungs! Co-led with Kaleb Hill, we studied smooth muscle and epithelial development in lizard lungs. Stay tuned for more! www.biorxiv.org/content/10.1...

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/...

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...

pnas.org

Excited to share our new paper by @danpaluh.bsky.social out today in @royalsociety.org Open Science; with a great team, including undergraduate researchers! "The metamorphic transition of the frog mouth: from tadpole kertanized mouthparts to adult teeth" 🦷🐸 royalsocietypublishing.org/doi/10.1098/...

The metamorphic transition of the frog mouth: from tadpole keratinized mouthparts to adult teeth | Royal Society Open Science

Teeth have been a prominent feature of most vertebrates for 400 million years, and the core regulatory network underlying embryonic tooth formation is deeply conserved. In frogs, however, odontogenesi...

royalsocietypublishing.org

Ever wondered how #sharks produce an unlimited supply of teeth? Our new preprint uncovers the genes within the dental stem cell niche driving lifelong tooth development. "Shark tooth regeneration: RNAseq reveals genes for unlimited dental renewal" 🦈🦷 bit.ly/47kkRHL

Shark tooth regeneration: RNAseq reveals genes for unlimited dental renewal

Sharks are masters of tooth regeneration with a rapid and unlimited tooth supply. We present a comprehensive transcriptomic analysis across five distinct compartments from the embryonic shark mouth, c...

bit.ly

Our new paper is out in Royal Society Open Science! The metamorphic transition of the frog mouth: from tadpole keratinized mouthparts to adult teeth doi.org/10.1098/rsos...

Shark tooth regeneration: RNAseq reveals genes for unlimited dental renewal https://www.biorxiv.org/content/10.1101/2025.08.26.672487v1

Check out this "donut" Sandbar #Shark (Carcharhinidae) embryo in #3D, #VR or #AR via @sketchfab.bsky.social, photogrammetry by Kayla Evans @floridamuseum.bsky.social. This specimen is from a set of embryos with spinal deformations. @ufresearch.bsky.social skfb.ly/pAqxN

Sandbar Shark, Carcharhinidae - 3D model by FloridaMuseum

A fluid preserved Sandbar Shark, Carcharhinus plumbeus, from the Florida Museum of Natural History Ichthyology Collection (UF 108719). This specimen is a fetus that has a spinal column deformity. O...

skfb.ly

An article I wrote on the legacy of JAWS for the 50th anniversary was picked up by Australian Geographic! 🦈🦈 ausgeo.co/jaws

50 years after ‘Jaws’ the man-eater myth has been retired - Australian Geographic

In the half a century since Jaws was released we know so much more about sharks’ amazing biology.

ausgeo.co

Here's a tortoise embryo developing inside its egg. Check out our new article in @cp-iscience.bsky.social to learn how molecular and mechanical systems sculpt their intricate head scales 🐢🧪 www.cell.com/iscience/ful...

First case of parthenogenesis in an intersexual zebra shark (Stegostoma tigrinum) having incomplete claspers onlinelibrary.wiley.com/doi/10.1111/...

In 1975, “Jaws” – the tale of a killer great white shark that terrorizes a coastal tourist town – captured people’s imaginations and simultaneously created a widespread fear of the water. (via @us.theconversation.com)

It's been 50 years since the blockbuster movie ‘Jaws,’ but there's more to be revealed about shark biology

A shark expert, whose own curiosity about these fascinating fish was sparked by the movie "Jaws," explains some of their unique features and the many discoveries made in the decades after its release.

buff.ly

PBS News @pbsnews.org posted my article with @theconversation.com on the progress of shark science and the evolving perception of sharks since the release of 'JAWS', 50 years ago! 🦈🦈🦈 #jaws #jaws50 #sharks

PBS News@pbsnews.org · last yr.

In 1975, “Jaws” – the tale of a killer great white shark that terrorizes a coastal tourist town – captured people’s imaginations and simultaneously created a widespread fear of the water. (via @us.theconversation.com) buff.ly/fRa4vkp

50 years after ‘Jaws,’ researchers have retired the man-eater myth and revealed more about sharks’ amazing biology theconversation.com/50-years-aft...

50 years after ‘Jaws,’ researchers have retired the man-eater myth and revealed more about sharks’ amazing biology

A shark expert whose own curiosity about these fascinating fish was sparked by the movie explains some of their unique features. Many discoveries came in the decades after ‘Jaws.’

theconversation.com

The “Tooth Hurty” Joke Has Its Origins In Ancient, Armored Fish - defector.com/the-tooth-hu...

The "Tooth Hurty" Joke Has Its Origins In Ancient, Armored Fish | Defector

Whenever Yara Haridy, a paleontologist at the University of Chicago, shows off the fossils she works with, people are often disappointed. Unlike the statuesque bones of dinosaurs or even the small spi...

defector.com

Cool shot of a super clear Catshark (Scyliorhinus canicula) egg. These shark egg cases vary in their transparency. This one is particularly see through. 🦈🦈🦈

Toothache may be hundreds of millions of years old. Teeth first evolved as sensory organs, not for chewing, according to a new analysis of animal fossils.

The first teeth were sensory organs on the skin of ancient fish

Teeth are good for chewing and biting, but they are also sensitive – and that may have been their original function hundreds of millions of years ago

newscientist.com

That look!! 👀 Our resident Bobcat came to visit this morning; captured on the backyard trail-cam! Such an awesome sight. I wonder if we'll have bob-kittens soon. 🐆 #bigcat #bobcat #backyardwildlife

The tooth, the whole tooth and nothing but the… frog? – the not-so bite-sized mystery of frog tooth re-evolution 🐸🦷 Check out this really fun post by @ryanharrison13.bsky.social, covering recent work from @danpaluh.bsky.social & team #preprint #preLight ⬇️ 👀 prelights.biologists.com/highlights/t...

Tooth development in frogs: Implications for the re-evolution of lost mandibular teeth and the origin of a morphological innovation - preLights

The tooth, the whole tooth and nothing but the… frog? – the not-so bite-sized mystery of frog tooth re-evolution 🐸🦷

prelights.biologists.com

New Pre-Print Alert! "Teeth Outside the Jaw: Evolution and Development of the Toothed Head Clasper in Chimaeras." We use fossil evidence, development and CT scans through ghost shark ontogeny to describe the emergence of the tenaculum! 👻🦈🦷 @karlycohen.bsky.social www.biorxiv.org/content/10.1...

🚨Registration for the UK #EvoDevo meeting is open! Join us on July 11th in London to enjoy an exciting day of talks, posters, friends, and superb science! -Registration (only £5!): shorturl.at/9cQGL -More info: londonevodevo.ac.uk