Zebrasoma
From Microcosm Aquarium Explorer
Zebrasoma xanthurum, Yellowtail Tang. Scott W. Michael
Family: Acanthuridae
Species in Genus Zebrasoma:
TANGS
These fishes are frequently employed to control algae in the reef tank. They browse on both microalgae and macroalgae. Their long snouts allow them to feed on algae in reef interstices.
Although tangs serve a useful function in the reef aquarium, some individuals do occasionally nip at the tissue of hard and soft corals. Large-polyped stony corals are their most frequent targets. They less frequently bother star polyps, gorgonians, zoanthids, and Tridacna clams (although they have been known to nip clam mantles).
This behavior is more likely in tanks where algae growth is sparse and little food is introduced (i.e., when the tangs are hungry). Adding sheets of dried algae is helpful. Tangs will sometimes consume small fanworms and rasp through the tubes of larger sabellid feather dusters.
Unfortunately, they are disease-prone in captivity: they are parasitized by black ich (a turbellarian flatworm), ich, and coral fish disease. They are also notorious for developing lateral line and fin erosion, a malady often blamed on a nutrient deficiency or poor water conditions.
Some species in the genus can be quite aggressive.