The sea cucumber that lives like a jellyfish has been introduced. The Pelagothuria natatrix is a very uncommon species of sea cucumber that spends most of its life swimming and has a gelatinous body.
The Marine Conservation Society has said extreme weather is the likely cause of the starfish washing up on Coppet Hall Beach in Saundersfoot, Pembrokeshire, on Tuesday.
From the discovery of a large bioluminescent shark to the use of an innovative drone to study hurricanes, these are the best marine stories of the year
Exploring Seamounts in the Deep North Atlantic Ocean hydro-international.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from hydro-international.com Daily Mail and Mail on Sunday newspapers.