Giant isopod (Bathynomus giganteus)
About 5,000 species of crustaceans in the order Isopoda live in Earth’s oceans. According to the National Oceanic and Atmospheric Administration (NOAA), they all have two pairs of antennae, compound eyes, and four sets of jaws. Their seven-segmented bodies have seven sets of legs for walking, and their six-segmented abdomens have more legs for swimming and breathing. This massive, 2-1/2 foot species—one of nine in the genus Bathonymus—lives in cold waters over 8,000 feet deep in the Pacific and Atlantic, and it can scavenge dead whales, fish, and squid. The Giant isopod is in good company, from other unbelievable underwater species to an underwater graveyard, the 13 creepiest things you can find at the bottom of the ocean give this crustacean a run for its money.