Echeneid

They are characterized by a unique cephalic sucking disc by which the echeneid attaches itself externally to its host.

Postflexion stage, larvae, and juveniles of some echeneids have been illustrated by Richards (2005a).

With a force applied to their caudal peduncle, the echeneids generated suction pressure differentials averaging –92.7 kPa within the disk cavity while attached to Plexiglas.