It's named Bathydevius due to its "devious" nature that fooled the scientists at first, while caudactylus refers to the dactyls -- the fingerlike projections on its tail.

An unusual sea slug with a large hood, a tail with fingerlike projections and glowing bioluminescence has been found living off the West Coast of the US.

MBARI researchers have discovered a remarkable new species of sea slug that lives in the deep sea. Bathydevius caudactylus swims through the ocean's midnight zone with a large gelatinous hood and paddle-like ...

Researchers have discovered a remarkable new species of sea slug that lives in the deep sea. Nicknamed the 'mystery mollusc,' the nudibranch Bathydevius caudactylus swims through the ocean's midnight zone with a large gelatinous hood and paddle-like tail, and lights up with brilliant bioluminescence.