Fish Farms:  Ivar Warrer-Hansen calculates capital costs would be €33 million for a 5,000-tonne a year farm on land in Ireland. Photograph: Getty Images/iStockphoto

Salmon can now be grown from egg to full-size on land-based fish farms, but a new report for the Irish aquaculture industry says capital costs are t(...)

Michael O’Meara believes certain   fish  which are currently  discarded can and should be eaten

Moon jellyfish, rabbit fish, grenadier or “rat tail” and wolf eel don’t look particularly tasty and tend to get tossed overboard when netted at sea. (...)

Howth Head in Dublin. Dublin Port is seeking EPA approval to dispose of ‘seabed material’ as part of its plans to deepen a navigational channel. Photograph: Thinkstock

The Environmental Protection Agency (EPA) has asked Dublin Port to submit further information on its application to dump almost 10 million tonnes of s(...)

An Atlantic salmon: Bord Iascaigh Mhara’s licence application had aroused opposition among angling and environmental groups.

Advocates and opponents of aquaculture have welcomed the decision by Bord Iascaigh Mhara (BIM) to withdraw its licence application for a 15,000-tonne(...)

Fishermen aboard a French trawler.  The Irish Wildlife Trust has expressed concern over EU fisheries policy. Photograph: Marcel Mochet/AFP/Getty Images

The Irish Wildlife Trust has expressed concern about what it describes as the “continuing decline of the marine environment in the Irish Sea”, followi(...)

Lough Feeagh, where the surface water  temperature rose at a rate of 0.35 degrees per decade between 1985 and 2009

The world’s lakes are warming more rapidly than the oceans or the atmosphere, according to new research which includes data from the Marine Institut(...)

The chimneys were formed as a side effect of chemosynthetic microorganisms over thousands of years of activity.

Deep-sea organisms living without sunlight and feeding off toxic “mud volcanoes” have been discovered by a team of Irish and international scientis(...)

Fishermen have long blamed seals for reducing species that are fished commercially in Irish waters. Photograph: The Irish Times

Seals, often blamed by fishermen for depleting whitefish stocks, are innocent of the charge, but they are partial to a bit of salmon, according to (...)

Dr Dick Feely, senior scientist with the US National Oceanic and Atmospheric Administration.

A global expert on ocean acidification has urged Ireland to become involved in monitoring its potential impact on the State’s multimillion-euro seaf(...)

Noise pollution  can transmit across thousands of square kilometres of ocean, causing physical injury, disorientation and death to whales and dolphins. Photograph: Simon Duggan/Provision

Whale and dolphin activity on Ireland’s continental shelf is being measured off the west coast this week by a 21-metre yacht known to be one of the (...)