Author: Poll, 1956
Comments: These fish are hardy, peaceful toward other species and highly intelligent.  They are microfeeders and not carnivorous.  In the wild, they often stay in deep water and never come to the surface to feed.  They never swim in midwater but are typical rock-dwellers.  Ventures into the open but never far from the rock cover.  Breeds in crevices and caves (Ref. 6770). Monogamous pairs are most common (Ref. 54944).