Heteronereis

Heteronereis: The Sexual Phase of Nereis – Morphology, Life Cycle, Habitat, and Reproductive Adaptations Introduction Heteronereis represents a distinctive sexual form or epitokous phase in certain polychaete worms, particularly those within the genus Nereis (family Nereididae). Unlike the usual benthic crawling larvae or adults, Heteronereis are free-swimming mature worms specialized for reproduction. This transformation involves […]