Goliath Tigerfish Floating Among a School of Zebra Tilapia Close Up

goliath tigerfish zebra tilapia cichlid hydrocynus goliath heterotilapia buttikoferi alestidae congo river lualaba river lake upemba lake tanganyika guineabissau liberia africa endemic large toothed water silver fins predator giant mbenga african freshwater river lake teeth jaws piscivore gamefish yellow white stripes aquarium tank breeding national geographic nat geo animal planet nature natural food fishing aquatic underwater school floating