Joel Corush

Seasonal long-distance migration of striped marlin associated with sea surface temperature in the western North Pacific 🦑🧪🌎🐟

The Dept. of Ecology and Evolutionary Biology at U. of Tennessee, Knoxville is accepting applications for MS or PhD. Admitted graduate students are fully funded through teaching assistantships that cover tuition, fees, and an annual pay of $28,134. Deadline Dec 1 2026. eeb.utk.edu/graduate-stu...

A new study by researchers in Bern found that certain cypriniform fish species exhibit both small bodies and small genomes, a correlation that has evolved independently in at least three lineages. 🐟🧪

Our paper’s out! 🐟👀 How does the four-eyed fish Anableps see in air and water at once? It expanded its air-facing ventral retina and redeployed existing opsins there. Congrats Louise Perez @perezlouise.bsky.social & Lina Shi! www.nature.com/articles/s41...

Hot off the presses! I reviewed the history of early ray-finned fishes, with a focus on their morphology, fossil record, and taxonomy. My principal goal is a guide for other workers to make the rich record of early actinopterygian evolution more broadly available. dx.doi.org/10.1002/jmor...

#FishADay Ameiurus nebulosus Brown Bullhead. FW Atlantic and Gulf Slope drainages of NA. First fish species documented to host a transmissible cancer--in this case, a melanoma that doesn't seem to be particularly deadly. www.nature.com/articles/d41...

With colleagues across museums in the US and Canada, we recently asked: what is North America's largest crayfish species? Which led to a more interesting follow-up question: why do the contenders all cluster at a similar upper size limit? New in Ecology at: doi.org/10.1002/ecy....

#FishADay Demogorgonichthys arcanus Demon Cave Fish. One cave system in northern Alabama. Eyeless; appears to have lost its vision following an evolutionary pathway separate from a close blind relative that is found in the same system! www.scientificamerican.com/article/newl...

Cool new paper finding lower diversification rates in diadromous salmonid lineages relative to non-migratory lineages. By Burridge, Simpson, Wilson, & @jonwatersnz.bsky.social doi.org/10.1093/evol...

Surgeonfishes are cool! Our Evolution paper now out in final form, the amazing patterns of change in fish shape and covariance (new method!) elegantly revealed by @linnealungstrom.bsky.social 🐟🐠🦑🌿 academic.oup.com/evolut/artic...

Great funded PhD opportunity with Dr. Andres looking at the invasion of the round goby (Neogobius melanostomus) throughout the Upper Mississippi River Basin. If you are interested in invasive species, fish, field work, and molecular methods take a look! jobs.rwfm.tamu.edu/view-job/?id...

Just learned this masterpiece got published today and couldn’t be more excited about it!! During my first PhD semester at UMich back in 2019 Willy gave an amazing talk about this project, setting the bauplan of the kind of research I have tried to do since! scholarlypress.si.edu/store/all/co...

Estimation of Contemporary and Recent Effective Population Size from Genomic Data www.annualreviews.org/content/jour...

Happy to see the new publication of our study on the Ironcolor Shiner and understanding its genetic diversity using population genomics. link.springer.com/article/10.1...

New paper out today! @sternarchella.bsky.social and I review how modularity and integration influence adaptive radiations and diversification. Read it here: rdcu.be/fpcSX

Glad to get this Ironcolor Shiner biogeography paper out in #ConservationGenetics! link.springer.com/article/10.1... Always a pleasure working with @rvcucalont.bsky.social Haruma Kurita, Brian Metzke, @mtanichthys.bsky.social @markdavis79.bsky.social

Here is every native freshwater fish species of the Azores islands. 1) The European eel. That is it! Found this individual on São Miguel Island, Azores 🇵🇹 On many remote islands only diadromous species can access the freshwater habitats resulting in low species diversity.

Stepwise loss of complexity in hagfish eyes prior to deep sea colonization royalsocietypublishing.org/rsbl/article...

#ERGAReads | Whole Genome Sequencing Reveals How Plasticity and Genetic Differentiation Underlie Sympatric Morphs of Arctic Charr 🧬 🐟️ onlinelibrary.wiley.com/doi/10.1111/... #genomes #ArcticCharr #plasticity #fisheries #bioeconomy #morphs #charr @evobiouppsala.bsky.social

There are more individuals of the deep-sea fish Cyclothone than any other vertebrate genus, maybe as many as one million billion. Distinctively ornamented ichthyoliths place the origin of Cyclothone in the greenhouse world of the early Eocene, ~55.6 Ma. royalsocietypublishing.org/rspb/article...

Crispim JL, P Argüello, GSC Silva, C Oliveira, KR Luckenbill & MH Sabaj, 2026. After eight decades: a new species of Pterobunocephalus (Siluriformes: Aspredinidae) from the upper Putumayo, Napo and Pastaza rivers, Ecuador. Neotropical Ichthyology 24:e250162.🐟🧪 doi.org/10.1590/1982...

Happy to share with you the completely updated assessment of the conservation status of Europe’s 559 known freshwater fish species. Not happy to report that nearly 50% of them are threatened. ▶️ Here is the #IUCN report 👇 sohub.io/nvoz

New paper led by @taylorblack.bsky.social shows AVT modulates aggression in darter lineages with nest site territoriality and paternal care but elicits no behavioral response in a species that secondarily lost territoriality and care www.sciencedirect.com/science/arti...

Once-Adventurous Salmon Can’t Believe She Ended Up Moving Back To Birthplace, Having A Bunch Of Kids https://theonion.com/once-adventurous-salmon-can-t-believe-she-ended-up-movi-1825827223/

Pleased to share a new phylogeny for the airbreathing or walking catfishes from the family Clariidae - part of my postdoctoral work at the AMNH in collaboration with Tobit Liyandja and Melanie Stiassny: www.sciencedirect.com/science/arti...

Finally is the paper where we present the unique genomic architectures of the Arctic codfishes out!! Nice work by @gadus-sivus.bsky.social and co-authors … @biovitenskap.bsky.social @unioslo-cees.bsky.social link.springer.com/article/10.1...

Aging killifish show systemic inflammation and accumulating DNA damage in progenitor-like immune cells, offering a window into the evolutionarily conserved mechanisms of vertebrate immune aging. Great work from Gabriele, @mdonertas.bsky.social, and the whole team. www.nature.com/articles/s43...

onlinelibrary.wiley.com/doi/10.1111/... Robin's new tool - looks nifty!

Reproductive fluids enabling cryptic female choice of paternity do not induce concomitant ejaculate-mediated paternal effects in embryos of hybridizing salmonid fishes: Lantiegne et al. 2026 @memorialu.bsky.social doi.org/10.1093/jeb/...

Cool paper, turning evolutionary theory on its head - gene conversion overcomes the cost of asexual reproduction… Gene conversion empowers natural selection in a clonal fish species www.nature.com/articles/s41...

Polypterids (bichirs + ropefish) are the sister lineage of all other living ray-finned fishes. Restricted to Africa today, fragmentary fossils show they inhabited South America until at least the Paleocene. Now Late Cretaceous finds add Madagascar to the list: www.sciencedirect.com/science/arti...

So sad 📉 - they're just gone. www.dailykos.com/stories/2026...

#paperalert #fishes Two closely related minnow ( #Phoxinus ) species share the same rivers — and sometimes even hybridise. But new research shows they've evolved completely different ways of determining sex. 🐟🧬 Lead author PhD student @thetemi.bsky.social @leibnizlib.bsky.social

Contrasting diversification and invasion histories of bivalves to the deep sea: "...evolutionary pathways to deep-sea endemicity are more often shaped by multiple, independent events than by in situ diversification" royalsocietypublishing.org/rspb/article... 🧪 ⚒️ #Paleobio #EvoBio #Macroecology

I'm recruiting a Ph.D. student for Fall 2026. Interested in comparative studies and trait evolution in fishes? Send me an email with a CV and research interests. Please take a look at my website (jcorush.github.io ) for more information about my research. #hybridization #minnows #mudskippers

New from #NearLab The role of ecology in allopatric speciation of darters in the Central Highlands, USA shorturl.at/YEmxH

NEWS from Ohio State Fish Division: You can now search our 6,000-tissue collection on our website! 🐟 mbd.osu.edu/collections/...

NEW METHODS ARTICLE: Phylogenetic GLMMs open doors to study evolution of discrete traits. We show how binary models extend to ordinal & nominal traits, using bird data, and provide tutorials to make these methods accessible to evolutionary biologists: doi.org/10.1093/jeb/... Mizuno et al.

@jcorush.bsky.social is looking for a PhD student

The Klamath River is flowing free again. RES and local Indian Tribes are restoring habitat, renewing cultural ties, and leading the largest dam removal in history. 🎥 Watch the film + explore the series: contentwithpurpose.co.uk/afs/tomorrow...

Roussel, Suh, @fjruizruano.bsky.social & @amdioncote.bsky.social characterized TE content in naturally occurring killifish hybrids, finding higher TE load and accumulation of Neptune subfamilies in hybrids. 🔗 doi.org/10.1093/molbev/msaf266 #evobio #molbio #TEsky

A new report reveals that fish and wildlife conservation generates substantial economic benefits. Federal, state, local, and nonprofit contributions combined contributed $115.8 billion in total economic activity and supported over 575,000 jobs nationwide. Read more: fisheries.org/2025/11/new-...

@snbogan.bsky.social @notothentoma.bsky.social @scotthotaling.bsky.social @paulbfrandsen.bsky.social et al. explore the evolution of type III antifreeze proteins in deep sea zoarcoid fishes. 🔗 doi.org/10.1093/molbev/msaf219 #evobio #molbio