The biggest specimens of lion’s mane are in Arctic and north Atlantic waters, and one reason for its abundance off Leinster could be that colder water at the bottom of the western Irish Sea suits successful production from the polyps. Illustration: Michael Viney

Those lion’s mane jellyfish that made the lives of some swimmers a misery last summer were of exceptional size. One stranded bell, stretched flat on a(...)

Angler Jim Clohessy  holds a 4.5kg (10lb)  sea bass which was tracked  in Cork harbour. Photograph: Dr Tom Doyle

European sea bass may look like fish and swim like fish, but they are also home birds. A new study to track the movement of the species has found that(...)