What fish redistribution in the Mediterranean is telling us about species’ climate resilience The Mediterranean is one of the world’s most vulnerable ecosystems. A scientific study on shifting distribution dynamics examines how its fish species contend with sea warming.

A new study in the Mediterranean reveals that #ClimateChange isn't a simple "move to the poles" story.

Their survival strategies are surprising! Many are moving South & West, seeking areas where warming is slower, and cold-water species are diving deeper.

More via @theconversation.com

A Super El Niño is coming. Here’s how a hotter ocean could change the weather near you By Andrew Freedman, CNN (CNN) — Get ready to hear a lot more about El Niño during the next several months — and maybe even longer — as the infamous

2026 #ElNiño event forming in the Pacific could be one of the strongest on record, likely making 2026 or 2027 the hottest years in human history.

For the ocean, this means:
📉 Ecosystem stress
🐟 Impacted fisheries
🌀 Extreme energy and weather chaos

@cnn.com

Coral reefs are nearing extinction. 2026 must mark a turning point | Jason Momoa At 1.5C of global warming, up to 90% of coral reefs could be lost. The next few months could be a defining moment

Coral reefs are nearing extinction. 2026 must mark a turning point | Jason Momoa

Ocean heat content in 2025 - Nature Reviews Earth & Environment As of 2025, the global full-depth ocean heat content (OHC) has risen by 481 ± 48 ZJ since 1960, with a pronounced increase of 24 ± 6 ZJ from 2024 to 2025. The highest elevations in OHC were measured in the Southern and Pacific Oceans.

🌡️ Ocean heat reached a record high in 2025, driven mainly by human activity.

Heat is building across the global ocean, especially in upper layers, increasing risks such as #SeaLevelRise, stronger storms and ecosystem stress. https://www.nature.com/articles/s43017-026-00775-1

Carbon conflicts in ocean fisheries - Nature Sustainability Nature Sustainability - Carbon conflicts in ocean fisheries

Fishing supports food and livelihoods but some practices can disrupt ocean carbon storage.

15% of the ocean faces potential conflict between fisheries and carbon sequestration, with 1/4 linked to #BottomTrawling and 3/4 to pelagic fisheries, largely in the High Seas. @soslavsk.bsky.social

Artificial reefs in the Persian/Arabian Gulf, initially developed like natural reefs, were hit and collapsed after repeated marine heatwaves from 2015.

The study shows that ocean warming must be addressed before artificial reefs can provide refuge from climate stress.

Ocean-Atmosphere Link Fuels El Niño's Antarctic Impact The intricate dance between the South Pacific Ocean and the atmosphere has long been a point of fascination among climatologists and oceanographers. In a groundbreaking study, researchers led by Tao,

#ElNiño events can shape Antarctic sea ice months after they fade.

Persistent South Pacific warming keeps atmospheric circulation patterns active, strengthening winter sea ice contrasts between the Antarctic Peninsula and Amundsen Sea and improving understanding of Antarctic climate variability.

Climate Change Alters Arctic Ocean Light Environment In the rapidly evolving narrative of climate change, the Arctic Ocean emerges as a critical and vulnerable front. Researchers have long known that warming temperatures and melting ice drastically

Sea ice loss will greatly increase light and warmth in Arctic seas this century. Conditions will increasingly favour boreal 🐟 like Atlantic cod and walleye pollock, while polar cod lose suitable habitat, driving major shifts in Arctic food webs.
#ClimateChange

New AI Approach Reveals Ocean Currents in Unprecedented Detail Scientists have developed a new method to measure ocean surface currents over large areas in greater detail than ever before.

🌊 Scripps Oceanography researchers developed an #AI approach that can spot patterns in satellite thermal imagery of the sea to reveal ocean currents in unprecedented detail. Learn how this advancement increases insights into ocean surface temperatures. ⤵️

The Global Deep Sea Exploration Goals: A representative approach to visually observing the deep seafloor The Global Deep Sea Exploration Goals identify 10,000 locations to create a representative visual dataset of the deep seafloor.

Only a tiny fraction of the deep sea has been explored, and existing data are heavily biased.

@oceandiscleague.bsky.social proposes observing 10,000 locations worldwide to create a more balanced and representative understanding of deep-sea ecosystems.

Shifting Climate Alters Pattern of Atlantic’s Giant Seaweed Blobs A 5,500-mile blob of seaweed in the Atlantic Ocean that has menaced beaches across the Caribbean and Florida in recent

Floating 𝘚𝘢𝘳𝘨𝘢𝘴𝘴𝘶𝘮 has nearly vanished from the north Sargasso Sea since 2015 as warming and changing ocean currents disrupt its supply.

dnyuz.com/2025/12/04/shifting-clim...

Coral reefs support around 1/4 of marine species & vital services, yet more than half have already been lost and most remain at risk.

The authors of this paper set out a roadmap for coral reef resilience, centred on finance, knowledge, regional political coordination, area-based protection & more.

Extreme global climate outcomes are possible even at 2°C warming, study warns Extreme climate impacts on people and the environment are often associated with very high levels of global warming (3 or 4°C). A new study led by the Helmholtz Centre for Environmental Research (UFZ) ...

A recent study shows that even at 2°C warming, climate impacts can be as severe as those expected at higher temperatures (3/4°C warming), highlighting the need to consider worst-case scenarios in climate planning. #ClimateChange

phys.org/news/2026-03-extreme-glo...

Deep Arctic Ocean warming enhanced by heat transferred from deep Atlantic Deep warming in the deep Greenland Basin accelerates heat transferred into the deep Arctic Ocean.

⚠️ Rapid deep-water warming in the Greenland Basin now supplies excess heat to the Eurasian Basin via the Fram Strait, driving accelerated deep Arctic warming beyond geothermal and local processes. https://www.science.org/doi/full/10.1126/sciadv.adx9452

End-of-century Arctic Ocean phytoplankton blooms start a month earlier due to anthropogenic climate change - Communications Earth & Environment Anthropogenic climate change impacts Arctic Ocean phytoplankton phenology, resulting in phytoplankton blooms which start 34 days earlier and last 15 days longer in 2100 compared with 1970, according t...

By 2100, Arctic Ocean phytoplankton blooms are projected to start about a month earlier and last longer as sea ice retreats.

These changes alter food availability for Arctic wildlife and communities. @colorado.edu https://www.nature.com/articles/s43247-025-02807-y

The #BBNJAgreement aims to protect biodiversity on the High Seas, but major data gaps and limited monitoring remain.

New technologies, better data sharing and stronger global collaboration are needed to support effective conservation and management. @pml.ac.uk https://go.nature.com/4lUgCIc

The role of sea ice in present and future Arctic amplification - Communications Earth & Environment Arctic amplification persists even in a year-round sea ice-free state due to greenhouse gas forcing, but weakens in a future year-round sea ice-free climate, implying Arctic sea ice’s importance, acco...

A study shows that sea ice underpins today’s strong, winter-focused #Arctic amplification.

As the Arctic moves toward an ice-free state, this seasonal pattern fades and overall amplification weakens, revealing sea ice as a key component of the current amplification regime.

Anthropocene genetic diversity loss in the marine tropics | PNAS Genetic diversity is a crucial component of biodiversity, and as such, its maintenance and preservation is of high conservation concern. Tropical e...

A century of change has caused major genetic erosion in two tropical fish species in the Coral Triangle 🇵🇭

By comparing historical and modern specimens, the study reveals steep declines that threaten resilience in one of the ocean’s most biodiverse regions. https://bit.ly/4uKTMGH

Asymmetry of abyssal warming in the Atlantic Ocean Recent studies show warming of bottom waters in the Southern Ocean and adjacent abyssal basins. The potential temperature trends are similar in differ…

Deep Atlantic waters are warming unevenly: temperatures rise west of the Mid-Atlantic Ridge but stay constant or cool to the east.

The ridge acts as a barrier, blocking the spread of Antarctic Bottom Water warming and reshaping the ocean’s deep heat balance. https://bit.ly/4t55sCJ

Illustrated poster featuring colorful seahorses and abstract ocean motifs on a blue-green background. Text reads: "PrepCom must lay the groundwork for ambition, equity, and action—so BBNJ COP1 is ready to deliver #BBNJPrepCom.

The High Seas is under growing pressure: warming, acidification, overexploitation.

#BBNJPrepCom 3 must lay the groundwork for #BBNJCOP 1 to move quickly toward High Seas #MPAs and sustainable management of our ocean. @highseasalliance.bsky.social

Scientists find sea levels are already much higher than we thought. That could spell trouble for the future | CNN Global coastal sea levels are on average 1 foot higher than previously assumed, a new report finds, raising alarms the world is underestimating how much land and how many people will be affected by ri...

Many coastal hazard studies underestimate #SeaLevelRise impacts because they use simplified sea-level assumptions.

Correcting these methods shows that far more land and people could fall below sea level than previously estimated, highlighting the need to reassess coastal risk worldwide.

Global ocean indicators: Marking pathways at the science-policy nexus Ocean knowledge is crucial for shaping policies that enable sustainable development, adaptation, and well-being at all levels, as everyone—either dire…

A study proposes a unified framework for science-based ocean indicators that bridge data & decision-making.

Using 9️⃣ pilot examples, it defines criteria to ensure reliability, comparability, and policy relevance, paving the way for a global system to monitor ocean health. @mercatorocean.bsky.social

As large herbivorous marine mammals, manatees play a critical role in maintaining seagrass bed health, supporting the broader coastal ecosystem that fish, invertebrates, and other species depend on. 🦭

#ManateeAppreciationDay #MarineScience

This image features three close-up panels of a yellow specimen, likely a small organism. Panel A shows the elongated shape with labeled parts. Panel B presents a magnified section, revealing a textured, granular surface. Panel C focuses on the finer details, emphasizing structural nuances. The scale bar in the images indicates sizes of 0.2 and 1 mm.

Scientists have discovered a new #DeepSea species of a filter-feeding worm, 𝘗𝘩𝘰𝘳𝘰𝘯𝘰𝘱𝘴𝘪𝘴 𝘥𝘦𝘱𝘳𝘰𝘧𝘶𝘯𝘥𝘪𝘴 𝘴𝘱. 𝘯𝘰𝘷., in the Sea of Okhotsk at depths down to 1,551 m.

A broader ecological change, possibly linked to pollution-driven habitat shifts, is overturning the taxonomy of these animals.

A vast, icy landscape featuring the snow-covered mountains and glaciers of Antarctica. In the foreground, a whale's tail is visible above the calm water, creating a serene scene. The sky is overcast, adding to the tranquil atmosphere.

Satellite data from 1992-2025 show that most Antarctic glacier grounding lines remain stable, but major retreat is occurring in vulnerable regions.

Warm ocean water reaching glaciers is driving ice loss, highlighting areas that could accelerate future #SeaLevelRise.
#WorldMetereologicalDay

A seal rests on a snowy, rocky beach, looking towards the camera. The background is a mix of snow and dark stones.

Decades of progress in protecting marine mammals are at risk as US lawmakers move to weaken the Marine Mammal Protection Act and Endangered Species Act. https://www.science.org/doi/10.1126/science.aec4817

#WorldWaterDay #InternationalDayOfTheSeal

Decade of Action for Cryospheric Sciences YouTube video by UNESCO

Today, the world celebrates #WorldDayforGlaciers.

Our cryosphere is melting at an unprecedented pace. The Decade of Action for Cryospheric Sciences (2025–2034) is a global effort to boost research and drive urgent action to protect Earth’s frozen areas.

Underwater scene with sunlight streaming through clear blue water, illuminating a bed of green seagrass. Small fish are swimming above the grass.

🌿 #StPatricksDay ocean edition

When you look under the ocean surface and see green, you are usually seeing the "machinery" of life: phytoplankton (The "Grass" of the Sea), marine macrophytes and dissolved organic matter.

"Green" water is "productive" and nutrient-rich, supporting the food web.

Climate Change Alters Ocean Stratification Dynamics The ocean's structure is fundamentally affected by stratification, a state where different water layers exhibit various temperatures and salinities. This stratification leads to a separation

🌊 The ocean’s layering is speeding surface warming, worsening low-oxygen zones and driving more marine extremes.

Strong regional contrasts are visible: salinity freshening boosts stratification in the Arctic, weaker or even decreasing stratification in the Southern Ocean.

Endangered Natural Pharmacy Hidden In Coral Reefs Researchers at ETH Zurich have identified hundreds of microbial species living among corals. These microbes produce a variety of substances with

Coral microbiomes harbour thousands of previously unknown microbial species and an exceptional capacity to produce natural products.

As reefs decline, this vast and largely untapped molecular diversity is at risk. @ethz.ch