John Pinnegar

Seabed Carbon Risks: What Our Evidence Shows A new technical briefing reviews the latest evidence on how trawling, other human activities and climate change affect seabed carbon.

A new review brings together over 30 UK & international scientists to assess the latest evidence on how human activities, including bottom trawling and climate pressures affect seabed organic carbon stores.

Read the blog to see what the evidence shows👇🌊

marinescience.blog.gov.uk/2026/02/25/s...

📢 PAPER ALERT 🚨
A new study led by Camila Artana and Andrea Kaplan reveals how marine heatwaves are reshaping Western Mediterranean ecosystems. Their frequency, intensity, and depth are rising fast — with major ecological consequences.

#MediterraneanInFlux

ICM-CSIC

Well done, I really struggle to pick out Caspian gulls, unless they are mature adults.

A colour photograph of an invitation card to the celebration dinner for the opening of the Marine Biological Association in Plymouth. The invitation is addressed to W. Garstang

#OTD in 1868 Walter Garstang was born. During his time @thembauk.bsky.social Garstang focused on investigating North Sea fisheries. He was involved with the establishment of a fisheries laboratory at Lowestoft, which has since become @cefasgovuk.bsky.social
📸 MBA Archive ref PGA1.2

Lecturer in Physical Oceanography (ATR1734) in University of East Anglia | UEA View details and apply for this Lecturer in Physical Oceanography (ATR1734) vacancy in University of East Anglia. Faculty of Science School of Environmental Sciences Lecturer in Physical Oceano...

We are advertising for a Lecturer in Physical Oceanography, closing date 31 March.

If you have research interests in the shelf seas, estuarine and coastal oceans then this could be for you!

And you could do research using UEA's fleet of ocean gliders

vacancies.uea.ac.uk/vacancies/20...

#ICESASC26 Call for abstracts is open!
What are you interested in?
🔥extreme climate events
www.ices.dk/events/asc/2...
🐟climate-smart fisheries
www.ices.dk/events/asc/2...
🌡️climate-driven size changes
www.ices.dk/events/asc/2...
🐟climate impacts on aquaculture
www.ices.dk/events/asc/2...

2025 has been confirmed as the third warmest year on record, following 2024 and 2023, in a series stretching back to 1850.

Data from the Met Office, @uniofeastanglia.bsky.social and @ncas-uk.bsky.social shows 2025 was 1.41 °C above the average for 1850-1900.

Read more 👉 bit.ly/3NkfQH9

🌊 New research out now in ICES Journal of Marine Science!
Using #OneBenthic, we reveal large-scale spatial patterns in marine epifaunal communities. One of four #Cefas papers under OWEC POSEIDON.

🔗 doi.org/10.1093/ices...

🔎 rconnect.cefas.co.uk/POSEIDON/

#BenthicEcology #POSEIDON #OWEC #ICESJMS

📢New paper!

🐟📚Using fish stomach contents spanning over a century, we reveal long-term diet shifts (from larger bivalves to smaller opportunistic prey) in demersal fish species in the western North Sea.

🔗 Open access in Fish & Fisheries: onlinelibrary.wiley.com/doi/epdf/10....

Fantastic visit to Cefas this week, chatting with herring experts and channeling our inner ‘Raiders of the Lost Archives’ 📖🐟

@cefasgovuk.bsky.social @johnkpinnegar.bsky.social @georginahunt.bsky.social @emilyphilly.bsky.social

Century‐Scale Changes in the Feeding Patterns of Demersal Fish Species in the Western North Sea Understanding the extent and magnitude of change in marine food webs requires historical data that predates modern monitoring efforts. Such information can provide invaluable insights into the longer...

See our latest @newcastleuni.bsky.social and Cefas paper by @georginahunt.bsky.social investigating long-term changes in the feeding of fish species in the North Sea. Plaice, dab and haddock exhibited marked dietary shifts throughout the early 20th century onlinelibrary.wiley.com/doi/10.1111/...

Southwest Octopus Bloom: Behind the Surge with Keith Hiscock, MBE YouTube video by The Marine Biological Association

In 2025, an explosion of common octopus appeared across the southwest coast of England

Dr. Keith Hiscock, MBA, explains what led to this “octopus bloom”, how it connects to long-term changes in our seas, and what it could mean for the future of UK marine life.

www.youtube.com/watch?v=nR2l...

Did someone say it's take an octopus to work day?

Brilliant photos from @akwildlifefalmouth showing the extent of the octopus surge in the southwest. This Risso's dolphin seemed to be having fun 🐙

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 🧵)

1850-2025 time series of global mean temperature anomaly from the HadCRUT5 dataset.

After a brief (ahem) hiatus, the HadCRUT5 global temperature dataset has now been updated to June 2025 by @metoffice.gov.uk @climateuea.bsky.social and @ncas-uk.bsky.social

Great talk on using historical sources to map herring spawning grounds by @georginahunt.bsky.social for @projectfishistory.bsky.social.

a large body of water with a sail in the foreground and clouds in the background ALT: a large body of water with a sail in the foreground and clouds in the background

🌍🚢🚲 The journey is part of the story!
We’re curious: how did you get to #ICESASC25?

We’re looking for the most sustainable (& maybe surprising!) journey to Klaipeda. Share your travel story & let’s celebrate the many ways our community is reducing its footprint while coming together for science.🌱💙

Join us today & Wedn in #ICESASC25 session R, where you can experience the breadth of @icesmarine.bsky.social science: from marine biodiversity & benthic ecology to fish biology & stock assessment to human dimensions - we have it all covered!
@johnkpinnegar.bsky.social @laurauusitalo.bsky.social

Looking forward to seeing you (as one of the co-conveners). I hope you’ve brought an umbrella!

Systematic attribution of heatwaves to the emissions of carbon majors - Nature Climate change made 213 historical heatwaves reported over 2000–2023 more likely and more intense, to which each of the 180 carbon majors (fossil fuel and cement producers) substantially contributed.

🌀📣 “the scientific case for climate liability is closed “ says lead author of NEW Nature study: may be a game changer tracing and attributing climate damages such as from heat waves 🥵 back to emissions from individual fossil fuel companies #ClimateAction #CarbonMajors

www.nature.com/articles/s41...

MARINElife SURVEY OPPORTUNITY: CEFAS PELTIC RESEARCH CRUISE 2025
Cetic & Irish Seas, Western Channel 2-20 Oct From Falmouth
Meals & cabin provided
Requirements: ENG1 medical certificate & Personal Sea Survival Certificate email tom.brereton@marine-life.org.uk if suitable @theseabirdgroup.bsky.social

An unprecedented marine heatwave in 2023 resulted in the global ocean absorbing significantly less CO₂ than anticipated, according to new research involving our School of Environmental Sciences. 🌊🌡️

Read more 👉: bit.ly/41E7BtQ

#CarbonDioxide #OceanSink #ClimateChange

@ueaenv.bsky.social @ethz.ch

OneBenthic unites seabed data from research, government & industry — incl. offshore wind & marine aggregates.

This collaboration underpins the new BGS Predictive Seabed Sediments (UK) dataset (www.bgs.ac.uk/datasets/bgs...), openly available for science & marine management.

#OneBenthic #OpenData

Line graph time series of global ocean heat content for the 0-2000 m layer for 3 year averages, yearly averages, and five years averages from the late 1950s to 2025. There is a long-term warming trend. The baseline is 1955-2006 for the zero reference to calculate the anomalies.

Meanwhile, back in reality, global ocean heat content just updated through June 2025 and set a new record high. Time to wake up!

Data (anomalies) & methods from www.ncei.noaa.gov/access/globa...

🐟🔥 The sea is warming… and that’s changing what we catch and how much it’s worth.

📊 In the NW Mediterranean, we analyzed 23 years of data to understand how climate change is reshaping fisheries.

#ClimateChange #Fisheries #Mediterranean

@icmcsic.bsky.social 
#LuciaEspasandin

🌍 Climate change is already reshaping Mediterranean fisheries.

📊 With indicators like MTC and MTR, we can anticipate risks and opportunities.

💡 Time to act: science, management, and adaptation.

#FutureOfFisheries #BlueTransformation

A satellite image of the southern North Sea, showing land in white and the sea in shades of grey. A semicircular pattern between UK and France can be seen in the English Channel. White dots in the sea are windmills and ships.

A wave train entering into the North Sea, seen by #Sentinel1 on 12 August. I am guessing it's tidal-related, but I have never seen this kind of signal in this region in SAR data before, pretty cool 😎

@jowilliams.bsky.social

"Extraordinary" investigation into UK octopus bloom launches - Oceanographic Plymouth and Devon county councils partner with DEFRA to launch investigative study into the cause and consequences of UK octopus bloom

Thanks to Oceanographic mag for this article on our new project on the UK #octopus bloom & to Plymouth City Council, Devon County Council & Defra for their financial support
oceanographicmagazine.com/news/extraor... @thembauk.bsky.social @plymbiomarsci.bsky.social @plymuni.bsky.social @pml.ac.uk 🐙

Deep trouble – future seafloor marine heatwaves will surpass surface extremes A new study shows that marine heatwaves on the seafloor could be more than 50% more frequent in future than at the surface of the ocean during hot summer months, a concerning prospect for bottom-dwell

🌊🔥 Deep trouble: New research reveals that #seafloor #MarineHeatwaves could be more than 50% more frequent than at the surface of the ocean - threatening bottom-dwelling species that cannot escape the rising temperatures, with ripple effects across entire ecosystems: pml.ac.uk/news/deep-tr...

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#Octopus #OctopusSwarm #OctopusBloom #ClimateChange #MarineHeatwaves