Deep sea spiders live on the ocean floor (some 2300 feet deep) and can grow nearly 3 feet wide.
The ocean sunfish or mola mola is one of the heaviest bony fishes.
Male anglerfish attach themselves to the females and live as sperm sacs.
Comb jellies are cannibals.
KAZUHIRO NOGI/AFP/Getty Images
Sawsharks use their saw-like snout to rip prey to shreds.
Check out more animal coverage here.