Living out in the open requires the crystal amphipod to become almost completely transparent. With the help of MBARI’s ships and deep-sea robots, scientists have revealed the secret to the crystal amphipod’s invisibility.

Learn more: www.mbari.org/animal/cryst...

Coelacanths are pregnant for five years, the longest gestation of any known animal, and do not reach maturity until they are around 55 years old.