Signal Crayfish
Pacifastacus leniusculus
Signal crayfish inhabit cool streams, rivers, lakes, and reservoirs, sheltering beneath stones, roots, and submerged debris. They are mainly active at night and eat aquatic plants, detritus, insect larvae, snails, and small animals. Powerful claws are used to seize food and defend against threats, while a rapid tail flip helps them escape backward. This North American species is widely invasive in parts of Europe and can carry crayfish plague without usually dying from it.
- Type
- Water / Shell
- Conservation status
- LC