the Well-Known Angler Fish of the ocean deep: have a fleshy growth that extends from its head (and some glow too) to lure its prey near that nasty mouth; usually about 12" long but can get to 3' long and weigh up to 110 pounds! Can open its jaw wide enough to swallow prey twice its size WHOLE!
The Japanese spider crab (Macrocheira kaempferi) is a marine crab that lives in waters @ Japan. It has the largest leg span (up to 12') of any arthropod & weighs up to 42 lbs. Adults live at depths of 500-2,000 ft. They like to inhabit vents in deeper parts of the ocean, consuming both plants & animals. Adults migrate up to @ 160 ft to breed. Females carry fertilized eggs attached to abdominal appendages till they hatch into tiny planktonic larvae & drift as plankton at the ocean’s surface.