crayfish

Research suggests that the invasive, all-female Procambarus virginalis originated in a German aquarium back in the 1990s.

Drunken crayfish will roll on their backs and enthusiastically perform tail flips in their tanks. The animals are more likely to display they behaviors after spending time in a social environment compared with an isolated one.

Hemocytes can form neurons in adult crayfish, a study shows.