The peacock mantis shrimp, found in Indian and Pacific oceans, is a colorful crustacean known for its incredibly fast and powerful punching ability.
The ribbon eel, found in coral reefs, starts black, then bright blue and yellow, and changes sex multiple times throughout its life.
Sea angels, specifically Platybrachium antarcticum, are predatory sea snails that glide through Antarctic waters to hunt shelled pteropods.
The gulper eel, or pelican eel, has a massive mouth, grows six feet, and swallows large prey when food is scarce.
The vampire squid, a unique sea creature with eight arms and two tentacles, is a passive filter feeder, named for its cape-like skin, living in dark waters.