Filled with live plants, substrates, and glimmering schools of fish, a perfectly curated aquarium is an awe-inspiring art form. But the best aquarium pets that aren’t fish prove that our finned ...

Small shrimps of the genus Hippolyte have the ability to change color to camouflage themselves in the algae where they live and escape predators. Depending on the algae they are in, they can turn red, ...