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

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 ...

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Robert May, a famed ecologist, posed a hypothetical question to the scientific community 15 years ago - if an alien spaceship landed on Earth, one of the first questions they would likely ask would be ...

More than 2,500 plant species have the potential to invade the Arctic at the expense of the species that belong there. Norway is one of the areas that is particularly at risk.

A scientist has discovered a new species of moth hiding in plain sight, thanks to innovations in DNA sequencing.