@clumpusjim.bsky.social
390 followers 350 following 75 posts
Fish biologist at Marine and Freshwater Research Institute (Iceland) , wildlife photographer and brewer of beer. Primarily interested in reproductive ecology of fish and all things lumpfish (C. lumpus).
Posts Media Videos Starter Packs
clumpusjim.bsky.social
My poster is currently being printed, this is the joy I will endure in the coming days.
kathleencarson.bsky.social
Ugh, and the do I/don't I talk to the person looking at my poster? Are they genuinely interested to just being polite? Do they want a minute to read it over? Or should I jump in and give them a pitch?
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trevorabranch.bsky.social
IT'S ADORABLE!
New fish species just dropped: the bumpy snailfish at 10,000 ft down in the ocean
gift link: www.nytimes.com/2025/09/08/s...
clumpusjim.bsky.social
With two above average year classes entering the fishery, ICES advice for Norwegian spring-spawning herring increases by 33 % to 533 914 tonnes. doi.org/10.17895/ice...
clumpusjim.bsky.social
After years of coastal states failing to agree to a shared TAC for Atlantic mackerel, leading to catches > advice, ICES advice for 2026 is 71 % lower than in 2025. doi.org/10.17895/ice...
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bioprotectproject.bsky.social
👩‍🔬BioProtect PhD student Marjolijn Rika Nijzingh collected 325 #eDNA samples at 37 sites (0–500m) around 🇮🇸 aboard RV Árni Friðriksson.

The data will reveal the presence of fish, mammals, corals & more, a big step for #30x30 goals!
Amazing job Marjolijn!👏

#MissionOcean #HorizonEU @mfri.bsky.social
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rebeccarhelm.bsky.social
I get that the news cycle is packed right now, but I just heard from a colleague at the Smithsonian that this is fully a GIANT SQUID BEING EATEN BY A SPERM WHALE and it’s possibly the first ever confirmed video according to a friend at NOAA

10 YEAR OLD ME IS LOSING HER MIND (a thread 🧵)
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jangeerthiddink.bsky.social
PhD opportunity @sosbangor.bsky.social on managing scallop fisheries to find the balance between conservation and fisheries yield. Get in touch if you're interested and I will email you the project description.
clumpusjim.bsky.social
A whole podcast dedicated to lumpfish!!!
nhseagrant.bsky.social
They’re round, suction-cupped, and as it turns out, full of secrets. #Lumpfish may not be glamorous, but these quirky creatures are doing serious work in the Gulf of Maine.
Tune-in to episode 2 of #TimeAndTide to learn about the secret lives of lumpfish: seagrant.unh.edu/blog/2025/06...

#MarineLife
clumpusjim.bsky.social
However, a new study shows that early estimates of age at maturity were too high due to biased sampling. Correcting for this results in no significant change in age at maturity over time. 2/n
www.sciencedirect.com/science/arti...
clumpusjim.bsky.social
Estimated age at which northeast Arctic and North Sea cod mature has decreased over time. This was considered to be a result of fisheries induced evolution whereby fisheries caught older fish, so fish which matured younger were more likely to spawn. 1/n
clumpusjim.bsky.social
More interesting Greenland shark reproduction tidbits
- Male do not mature until they are at least ~2.6 m
- Females do not mature until they are at least ~3.9 m
- It is estimated that they produce 200–324 pups per pregnancy
- new born pups are 35-45 cm
journals.plos.org/plosone/arti...
clumpusjim.bsky.social
2/n Absence of neonates in the evaluated data and the scientific literature in general suggests pupping occurs in bathypelagic or benthic habitats of mid-Atlantic Ridge and/or the Irminger Sea.
Picture of neonate Greenland sharks, with one showing the vitelline scar.
clumpusjim.bsky.social
1/n Fascinating study collating records of Greenland shark across the Atlantic

– males and subadult females found in cold arctic water
– adult females reside in warmer Atlantic water
– large juveniles are common both in high-Arctic and temperate areas
onlinelibrary.wiley.com/doi/10.1002/...
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jethroreading32.bsky.social
Every so often I come across a big weird fish I haven't heard of that is so odd and delightful it feels like a gift from the universe to me personally. Anyway I somehow went 25 years without hearing of Gasterochisma, this big bizarro primitive tuna beast. Lovely stuff.
A scientific compound figure showing an adult Gasterochisma specimen. The first image shows the whole animal - it is generally shaped like a tuna, but has a small eye and a big forehead, and has huge scales all over its body. The second and third images are close-ups of the head with anatomical features labelled. Credit: Santos & Nunan 2014 An angler posing with a recently caught Gasterochisma specimen aboard a small fishing vessel close to some rocks. The scales are so shiny you can see reflections in them. The fish is quite big, perhaps 150cm long, and apparently weighed 32kg. Credit: Wade Pelham, RedMap.
clumpusjim.bsky.social
What a coincidence, we at @mfri.bsky.social are just coming to the end a three week seabed mapping cruise (blue lines). The data prepared so far is open access and can be downloaded at the MFRI website www.hafogvatn.is/en/research/....
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mfri.bsky.social
Lumpfish spawn around the coast of the Nordic countries, with the young migrating away from the coast as they grow. New research shows that temperature is the main driver of lumpfish distribution in the Nordic Seas.
More here: www.hafogvatn.is/en/about/new... #lumpfishresearch #marinebiology
Temperature is the main driver of lumpfish distribution
Lumpfish spawn around the coast of the Nordic countries with the young migrating away from the coast as they grow, but where do they go? The new
www.hafogvatn.is
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bioprotectproject.bsky.social
🏊 Swimmer #RossEdgley is taking on 1,000 miles in 100 days - alongside killer whales 🐋 through 130ft waves 🇮🇸 🌊
🧑‍🔬 This epic #swimforscience is also an innovative #citizenscience mission‼️
🧬 Ross will collect #eDNA for 🧐 in #BioProtect in 🤝 with
@mfri.bsky.social & @matisiceland.bsky.social
🤗 Coming 🔜
clumpusjim.bsky.social
Ross Edgley will attempt a historic first: 1,610 km swim around the entire coastline of Iceland. Along the way, his support vessel will collect eDNA samples, and conduct microplastic monitoring, and marine mammal identification.
christophe-p71.bsky.social
If you want to know more about the opportunity that Ross Edgley gave us during his swim contest around Iceland, here is the post from the BioProtect EU mission project:
bioprotect-project.eu/the-great-sc...
The Great Scientific Swim around Iceland: 1,000 miles in 100 days! - BioProtect
bioprotect-project.eu
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michellejewell.bsky.social
Friends, I am seeking a historian in either Irish or Scottish lore specialized in leviathans, basking sharks, or any other marine creatures.
Basking shark historical sketch.
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tjnear.bsky.social
New from the Near Lab, led by @chasedbrownstein.bsky.social

"The many origins of extremophile fishes"

We explore the phylogenomics and evolutionary history of the lovely and bizarre eelpouts, ronquils, pricklebacks, and wolffishes (Zoarcoidea).

royalsocietypublishing.org/doi/10.1098/...
clumpusjim.bsky.social
Interesting, could you send me a copy james.kennedy[at]hafogvatn.is
clumpusjim.bsky.social
Productivity (primary or secondary) did not appear to influence the distribution of lumpfish.
The distribution of juveniles is likely driven by hatching location and ocean currents. (5/n)