Velvet swimming crab
Alternative names: Necora puber, Devil crab
The velvet swimming crab can be found throughout European waters and around most of the UK are Ireland. It can grown up to 9 cm in width across its carapace.
Its colour is usually brown to green, with violet tinges to the limbs, a "velvet" texture of the carapace when rubbed and distinctive red eyes.
It is usually more aggressive than other species of crabs.