closeup portrait of a midas cichlid, a popular tropical fish from the san jaun river in costa rica

amphilophus animal animals aquaculture aquarium beautiful bright bump caribbean cichlid cichlidae cichlids citrinellus citron closeup colorful costa exotic fish fishes fresh head headed hump humped ichthyology jaun juan known lake lemon life marine midas ocean orange ornamental pet pets popular portrait rica river san sea trade tropical vivid water well white yellow zoology