Caridean shrimps can be distinguished from other shrimp-like creatures by the way in which the plate of the second abdominal segment overlaps the segments both in front and behind, forming a saddle. They are found in marine, brackish and freshwater habitats from the tropics to the polar regions. Carideans are taxonomically and ecologically diverse, with many remarkable adaptations for survival and reproduction.These crustaceans are placed in the infraorder Caridea, order Decapoda, and class Malacostraca.