view of a marbled gourami aquarium fish in closeup

air anabantoids aquarium aquatic black bluish breather bred bubble builder canals captive caudal closeup color crustaceans dorsal eater fin fins fish flowing freshwater gill gourami gray guard hardy labyrinth long lowland marble marbled marches morph nest omnivores opaline organ pattern peaceful peatlands pectoral pelvic scales shallow silver sluggish spot standing streams swamps tail three trichopodus trichopterus underwater water waters wetlands white