Abstract The family Lamippidae (Cyclopoida) are endosymbionts mainly occurring in shallow water octocorals and records from deep-sea corals few. Here we investigated the relationship between lamippid Gorgonophilus canadensis Buhl-Mortensen & Mortensen, 2004 its host coral Paragorgia arborea . Twenty-one specimens of G. was found inside eight gall-like structures on a P. colony collected 201...