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Marine Wildlife
River Guardians: A white-clawed crayfish in its freshwater habitat. Ireland's only native crayfish species is under threat following confirmation of crayfish plague in the River Camac, Dublin.
Water users are being urged to follow strict biosecurity measures after a crayfish plague outbreak was confirmed in the River Camac in west Dublin. Minister for Nature, Heritage and Biodiversity Christopher O'Sullivan issued the appeal following reports from the Marine…
Whale Warning — A critically endangered Rice’s whale surfaces in the Gulf of Mexico. Fewer than 100 remain, with scientists raising concerns that underwater noise from oil and gas surveys may threaten the species' survival.
The extraordinary subsea communication sounds of Rice’s whales and the impact of oil and gas surveying have been published in a new graphic by The New York Times. There are fewer than 100 Rice’s whales in existence, and they live…
Hidden Catch — An Indonesian fisher displays a squid catch aboard a distant-water vessel. The Environmental Justice Foundation says workers reported long periods at sea, poor conditions and limited oversight in global squid fisheries. Credit: Environmental Justice Foundation
A new investigation by the Environmental Justice Foundation (EJF) says the global squid industry is characterised by widespread illegal fishing, environmental destruction and severe human rights abuses among crew. The EJF says it has drawn on five years of research,…
Clawed Crisis — A White-Clawed Crayfish, Ireland's only native crayfish species. Conservationists are urging vigilance after crayfish plague was confirmed in Dublin's Camac River.
A confirmed case of plague in White-Clawed Crayfish has been confirmed on Dublin’s Camac River. In a post on LinkedIn, the National Biodiversity Data Centre (NBDS) appeals to anglers and others to report any dead or dying crayfish to its…
Whale Watch — Sperm whales swim in waters where vessel strike risks are being assessed through regional case studies. The new report highlights mitigation measures for species in hotspots including the Canary Islands and Greece.
A new international report has highlighted growing efforts to reduce vessel strikes on whales and other marine megafauna as global shipping traffic continues to increase. The findings were presented following a specialist workshop held during the European Cetacean Society Conference…
Jellyfish Trailblazer — Moon jellyfish drift through a display at Dingle Oceanworld dedicated to Valentia Island naturalist Maude Delap, whose pioneering work made her the first person to breed jellyfish successfully in captivity.
Hundreds of jellyfish are being bred at Dingle Oceanworld in Co Kerry using techniques pioneered more than a century ago by Valentia Island naturalist Maude Delap. The aquarium has dedicated its jellyfish display to Delap, who became the first person…
“Bay
Arctic and Common Terns returning to Dublin Bay for the 2026 breeding season will be welcomed by two new nesting pontoons installed by Dublin Port and BirdWatch Ireland. The floating nesting structures have been deployed near the Dublin Port Greenway…
Wetlands Watch – Minister Christopher O’Sullivan joins representatives from Kerry County Council, NPWS and community groups during a visit to Tralee Bay Wetlands Ecology Park in Kerry.
Minister of State for Nature, Heritage and Biodiversity Christopher O’Sullivan TD visited Tralee Bay Wetlands Ecology Park and Activity Centre on Friday, 22 May. The visit followed his official opening of the Kerry Biodiversity Conference 2026 at Munster Technological University…
Porpoise Peril: Harbour porpoises recorded the highest levels of PFAS ‘forever chemicals’ in a new Solent marine pollution study, with liver tissue concentrations exceeding ecological safety thresholds.
 A new study on “forever chemicals” in the marine environment says that current legislation is not doing enough to protect the environment or public health against toxic per- and polyfluoroalkyl substances (PFAS).  Research by the University of Portsmouth and the Marine…
Sea Story — Artist Mairead Brennan beside her new Rays and Ripples mural at Galway Atlantaquaria in Salthill, celebrating the rich diversity of sharks, rays and marine life in Galway Bay
The diversity of sharks, rays and flatfish in Galway Atlantaquaria and the native species in Galway Bay are themes of a new mural exhibited at the Salthill aquarium. “To portray something that is profoundly magical and beautifully ordinary” is a…
“Gentle
Two of the world’s largest whale species appear to be making a gradual population recovery from extensive commercial whaling. New research reveals a recent increase in sightings of blue and fin whales in the south-eastern Atlantic. The findings, published in…
“Tail
Two humpback whales may have broken records on swims between east Australia and Brazil, scientists say. As RTÉ News and The Guardian report, a team of international scientists studied tens of thousands of images taken of whale flukes to identify…
“Sea
Marine conservation groups staged a demonstration outside Leinster House on Thursday, calling on the Government to publish long-awaited Marine Protected Area legislation.  The rally was organised by the Fair Seas coalition, whose members include the Irish Wildlife Trust, BirdWatch Ireland,…
Waiting Game — An offshore scene framed by sunlight and sea as an Oireachtas committee warns that delays and under-resourcing are slowing Ireland’s offshore renewable energy ambitions.
Planning and consenting authorities involved in applications for offshore renewable energy (ORE) projects need to be given better resources, an Oireachtas committee report says. Measures supporting the filling of positions, in particular the National Parks and Wildlife Service, which are…
Orange brisingids on coral are among the organisms comprising the benthic communities that underpin the health of Ireland’s coastal ecosystems
Over 650,000 marine wildlife records spanning 12 years are now freely accessible online — marking what the Marine Institute calls “a landmark moment” for open science and open environmental data in Ireland. To mark Biodiversity Week 2026, which continues to…
Seagrass Warning — A seagrass meadow beneath Northern Ireland waters, where Queen’s University Belfast research found damaging nitrogen pollution linked to agricultural runoff and sewage.
New research by Queen’s University Belfast (QUB) has found that seagrass meadows across Northern Ireland are under threat from severe pollution linked to agricultural run-off and sewage. Even meadows which have legal protection from human disturbance, such as marine protected…

Marine Wildlife Around Ireland One of the greatest memories of any day spent boating around the Irish coast is an encounter with marine wildlife.  It's a thrill for young and old to witness seabirds, seals, dolphins and whales right there in their own habitat. As boaters fortunate enough to have experienced it will testify even spotting a distant dorsal fin can be the highlight of any day afloat.  Was that a porpoise? Was it a whale? No matter how brief the glimpse it's a privilege to share the seas with Irish marine wildlife.

Thanks to the location of our beautiful little island, perched in the North Atlantic Ocean there appears to be no shortage of marine life to observe.

From whales to dolphins, seals, sharks and other ocean animals this page documents the most interesting accounts of marine wildlife around our shores. We're keen to receive your observations, your photos, links and youtube clips.

Boaters have a unique perspective and all those who go afloat, from inshore kayaking to offshore yacht racing that what they encounter can be of real value to specialist organisations such as the Irish Whale and Dolphin Group (IWDG) who compile a list of sightings and strandings. The IWDG knowledge base has increased over the past 21 years thanks in part at least to the observations of sailors, anglers, kayakers and boaters.

Thanks to the IWDG work we now know we share the seas with dozens of species who also call Ireland home. Here's the current list: Atlantic white-sided dolphin, beluga whale, blue whale, bottlenose dolphin, common dolphin, Cuvier's beaked whale, false killer whale, fin whale, Gervais' beaked whale, harbour porpoise, humpback whale, killer whale, minke whale, northern bottlenose whale, northern right whale, pilot whale, pygmy sperm whale, Risso's dolphin, sei whale, Sowerby's beaked whale, sperm whale, striped dolphin, True's beaked whale and white-beaked dolphin.

But as impressive as the species list is the IWDG believe there are still gaps in our knowledge. Next time you are out on the ocean waves keep a sharp look out!