The Good Fish / Bad Fish Tool
for Saltwater Aquariums,
Award-winning tool for creating ocean-friendly aquariums.

Achilles Tang

Achilles Tang

Dark blue to black; orange large teardrop near tail base; orange and white tail; white stripes at bases of dorsal and anal fins. The Achilles Tang has been severely overharvested by the aquarium trade in Hawaii with populations down to a small percentage of their... Read More
Blue Tang

Blue Tang

Blue body; dark/black hook shaped marking between eye and tail; tail is yellow bordered in black. Since being cast as “Dory” in the movie “Finding Nemo”, Blue Tangs are disappearing from their native reefs from increasing hobby demand.... Read More
Clown Tang

Clown Tang

Yellow to orange base on mid to upper body with dark edged blue stripes; blue/grey belly. To 15 inches.  Many Clown Tangs are captured with cyanide, an illegal practice harming both fish and reefs. Attempts at captive breeding have been unsuccessful. Read More
Naso Tang

Naso Tang

Grey to brown body; yellow nape; orange tail spines and anal fin. To 18 inches. Significantly depleted on Hawaii reefs where they are captured by the aquarium trade with nets. Outside Hawaii, many are captured with cyanide, an illegal practice that harms both fish and... Read More
Powder Blue Tang

Powder Blue Tang

Blue body; black head; yellow dorsal fin; white ventral and anal fins; white and blue tail fin. To 15 inches. Many Powder Blue Tangs are captured with cyanide, an illegal practice harming both fish and reefs. Attempts at captive breeding have been unsuccessful. Read More