Author: (Linnaeus, 1758)
FBname: Rock cook
Comments: Adults are found in eel-grass beds near rocks.  Feed on small invertebrates (Ref. 4742).  Eggs are laid in the summer in a seaweed nest (Ref. 35388).  Males grow faster than females (Ref. 4792).  Oviparous, distinct pairing during breeding (Ref. 205).  Used in salmon culture as cleaner fish (Helmut Tethmeyer, pers. comm.).