Add Yahoo as a preferred source to see more of our stories on Google. Dumbo octopuses live in the deep open ocean down to depths of at least 13,100 feet (4000 m) and perhaps much deeper, making this ...

Reaching 13,000 feet below sea level requires specialized biological structures found only in the Grimpoteuthis genus. The absence of ink sacs complicates defense mechanisms for deep-sea octopuses ...