From worms with squid-like tentacles to fish with teeth on their tongues, here are some of the most alien-looking creatures ...

The backward-swimming deep-sea fish typically measured between 1 and 2 feet in length and were seen at depths of roughly 2.8 miles to 4 miles down, the study said.

The colossal squid, the world’s largest squid species, was caught on video for the first time swimming in its natural habitat, according to a California ocean research organization. This squid ...