37. The Sea Pig (Scotoplanes globosa)
The Sea Pig is a bulbous, pink sea cucumber that scuttles across the abyssal plains, often seen in large herds as they scour the seafloor for organic debris. Recent research has uncovered new species within this group and documented fascinating examples of group behavior, highlighting their social tendencies in the deep. With their peculiar shape and gentle movements, sea pigs have become icons of deep-sea exploration. Learn more at Smithsonian Ocean.