There’s only one freshwater hermit crab ... Sometimes when a new shell turns up, hermit crabs will form a line, biggest to smallest, to see which animal fits the new shell.

The giant freshwater stingray may be the world’s largest freshwater fish ... Stingrays locate prey, usually clams and crabs, with sensors located around their mouth that can detect an animal ...

The video above, filmed at the MalaMala Private Game Reserve in South Africa, shows how a tiny freshwater crab managed to survive a lion encounter In the video, filmed by park rangers, the four ...

The largest number of these threatened ... Researchers evaluated 23,496 species of freshwater fish, dragonfly, damselfly, crab, crayfish and shrimp, and found that 24%, are threatened with extinction.