All aquarium fish on letter W
 White-belly damselfish Amblyglyphidodon flavilatus (sea) colors: silver |
 Weather Loach Misgurnus anguillicaudatus (freshwater) colors: spotted |
 White-spotted Puffer Arothron hispidus (sea) colors: spotted |
 Warty frogfish (Clown frogfish) Antennarius maculatus (sea) colors: spotted |
 Ward's sleeper (Tiger Watchman Goby) Valenciennea wardii (sea) colors: striped |
 Wheeler's Shrimp Goby Amblyeleotris wheeleri (sea) colors: striped |
 White Cloud Mountain Minnow Tanichthys albonubes (freshwater) colors: silver |
 White-edged (Blotcheye Soldierfish) Myripristis murdjan (sea) colors: red |
 Weeksii Bichir Polypterus Weeksii (freshwater) colors: spotted |
 Web Burrfish Chilomycterus antillarum (sea) colors: spotted |
 Wimpel Piranha Catoprion mento (freshwater) colors: silver |
 Western Talma Chelmonops curiosus (sea) colors: striped |
