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

The alien-like creature is known as Aplysia depilans, or the 'Mediterranean sea hare', a species rarely seen in the UK.

CHARLOTTE, N.C. — A marine creature that resembles the alien E.T. has been found growing in a prehistoric area of eastern Pacific seafloor rock. The “E.T. sponge” has been classified as a new species ...

Everything really is bigger - and stranger - in Texas. This year proved the Lone Star State is full of wild surprises after several Texans spotted some rare and unusual encounters with sea creatures ...

A boy may be harbouring an alien lifeform in his home after he "discovered a creature that feeds off light" in a meteorite. Clips of greenish-yellow slime oozing out of a silver rock have spread like ...