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Marine Wildlife
IWDG research yacht Celtic Mist anchored off the Irish coast
The chairman of the board of the Irish Whale and Dolphin Group (IWDG), Dr Patrick Hartigan, has said that a new research vessel is essential to meet the organisation's objectives of gathering data through citizen science. In the Group's 2025…
Molly the sea turtle tagged and ready for release into the sea
A sea turtle that spent the last 22 years living in a Dingle aquarium after washing ashore on a Kerry beach has been returned to the wild. As RTÉ News reports, Molly the turtle became known as the ‘queen of…
Researchers aboard KiwiGirl in Donegal Bay for RTÉ's 10 Things to Know About marine life programme
Marine life in Irish waters, from watching whales and dolphins in Donegal Bay to studying the underwater soundscape of the Irish coastline, is among the themes covered in the new series of RTÉ television's 10 Things to Know About. Presenters…
Two authors whose books explore how protecting our seas and oceans is so vital in the response to climate breakdown will speak at the Dublin Book Festival on Sunday November 8th.  Michael Cronin’s Ireland: Why It Matters to Be an Island…
Whale bones on display at The Coastal Zone in Portrush
A record-breaking number of visitors came through the doors of the Portrush Coastal Zone in 2026 to learn about Northern Ireland’s marine environment, new figures have revealed. A total of 61,315 visitors visited the centre, which features interactive exhibits about…
A beluga whale blowing bubbles in Donegal Bay on Saturday 17 October
A recent sighting of a beluga whale off Donegal is only the second recorded this century, the Irish Whale and Dolphin Group (IWDG) says. The remarkable visitor was captured on video by Sebastian Szumlański at Fintra on Donegal Bay last…
Shelling Out – Ulster Wildlife's native oyster restoration team celebrates winning Biodiversity Initiative of the Year at the 2026 All-Ireland Sustainability Awards, recognising its pioneering work to restore native oysters to Northern Ireland's coastal waters
Ulster Wildlife's work to restore the endangered European native oyster (Ostrea edulis) to Northern Ireland's coastal waters has won Biodiversity Initiative of the Year at the 2026 All-Ireland Sustainability Awards. The award recognises a restoration programme that has established four…
Basking shark in Inishtrahull Sound off Donegal, where new research examines feeding and social behaviour
New research using decades of Irish basking shark sightings suggests that food availability determines how often sharks gather, while social attraction influences the size of their groups. Simulated research on basking shark behaviour off Donegal has found that both food…
Jack O'Donovan Trá of Fair Seas, Lukas Werner and Elis Martinelli of Sea Synergy during marine biodiversity surveys near Valentia Island, Co Kerry
Sea Synergy divers have recorded a rare fan mussel during marine biodiversity surveys in the Portmagee Channel, highlighting the importance of continued research into Kerry's protected coastal habitats. A rare fan mussel (Atrina fragilis), one of Europe's largest bivalve molluscs,…
Vanishing Shore Life – Bare rock on the Wexford coast where seaweeds, barnacles and sea anemones were previously found, illustrating Coastwatch's concerns over major biodiversity losses on Ireland's east coast. Photo: Karin Dubsky
Coastwatch is reporting cleaner coasts but “major” losses in shore life on the east coast during its autumn survey. The NGO is appealing for more volunteers to complete its survey which ends on October 20th. So far survey results for…
Colony shift — Chinstrap and macaroni penguins on Zavodovski Island, where researchers have recorded a major decline in chinstraps while macaroni penguin numbers have remained stable
A remote volcanic island near Antarctica has lost its title as the world's largest penguin colony after new research revealed massive population declines. Researchers from the British Antarctic Survey (BAS) found that over half a million chinstrap penguins have disappeared…
Upstream battle: Wild Atlantic salmon negotiate a river weir as a Government review proposes more precautionary measures to protect Ireland’s depleted salmon populations
A review of management of wild Irish salmon has been initiated by Minister of State for the Marine and Climate Timmy Dooley. Following a review of Ireland's salmon management framework by Inland Fisheries Ireland (IFI), the Department of Climate, Energy…
Deep-water mystery: True’s beaked whales normally inhabit deep waters around the Continental shelf, making the fatal stranding of a mother and calf near Camp in Co Kerry unusual
A mother and calf cetacean stranded near Camp in Co Kerry have been confirmed as True’s beaked whales. As Radio Kerry reports, shore walkers discovered the nearly five-metre adult and its calf on the coast early last week and raised…
River revival: The Klamath River in California, where the removal of four hydroelectric dams has reopened hundreds of kilometres of habitat to migrating salmon.
Removal of four dams from a north American river has led to such large runs of salmon that they have exceeded researcher expectations. The findings published in the journal Scientific Reports say that thousands of chinook salmon have been recorded…
Deep Restoration: An artificial reef installed in 950 metres of water off the Porcupine Bank as part of the REDECOR deep-sea coral restoration project. Photo: Ifremer/REDECOR 2026
Twenty-three artificial reefs have been placed on the seabed off the south-west Porcupine Bank, off the west coast of Ireland and in the Bay of Biscay, France,as part of a project to restore deep sea coral. Researchers from University of…
Lapwing lift: A bumper breeding season at Annagh Marsh Nature Reserve in North Mayo saw 67 Lapwing pairs successfully rear at least 143 chicks to flying stage
BirdWatch Ireland says that the Lapwing, one of Ireland's rarest breeding bird species, has had a bumper breeding season on North Mayo’s Mullet peninsula. A total of 67 pairs of the wading birds successfully raised at least 143 chicks at…

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!