Development and behavior of megalopae of the non-native crab Hemigrapsus sanguineus in response to chemical cues from coastal fishes

► Native fish prey on megalopae of the Asian shore crab Hemigrapsus sanguineus. ► Chemicals from fish do not affect timing of molting of H. sanguineus megalopae. ► Fish chemicals affect behavior of H. sanguineus megalopae in still and flowing water. ► Chemicals from adult conspecifics affect molting but not behavior of megalopae.