evidence: From worms with squid-like tentacles to fish with teeth on their tongues, here are some of the most alien-looking creatures in the deep ocean. The deep sea is home to weird and wonderful creatures that, over millions of years, have evolved specific traits to survive the extreme conditions of their habitat. These adaptations to their environment have resulted in some truly alien-looking animals. [...] Some of the deepest-dwelling animals have adapted to the abyss by adopting light-producing organs to attract prey or signal to each other. Others have evolved gigantic mouths, expandable stomachs or mismatched eyes. Regardless of their specific traits, deep-sea creatures have captured the imagination of many people due to their otherworldly — and often nightmarish — appearance.