These creatures are so fragile that the moment they are pulled out from the water, they collapse and disappear.

The Rock Pool Project in Plymouth says the non-native sea hare looks "alien-like".

Dive into the depths of the ocean to discover seven rare deep-sea creatures so strange and elusive, you won't believe they ...

Charley Taviner, five, was following a crab when he found what he thought was a huge lump of seaweed. But it turned out to be Aplysia depilans - or the "Mediterranean sea hare" - a species rarely seen ...

A young rock-pooler discovered a rare ' alien-like ' winged creature washed up on a UK beach. Charley Taviner, five, was ...