Tang fish are colorful aggressive large community aquarium fish that are hardy and easy to keep but hostile to reef environments. Large saltwater aquarium fish require large fish tanks and clean water with good circulation. Great fish for a FOWLR (Fish Only With Live Rocks), the tang fish is rough on reefs. Most tangs will be aggressive to other tankmates so introduce them carefully, and most tangs require large aquariums, frequent feeding (algae and meaty foods, but especially algae), and clean water. Getting it all right is part of our Exotic Hobby.