Out on the Hawaiian coral reef, bigger is better! Most fish species try to look larger than they are when threatened by a predator, and the sail-fin tang is a master at changing its size when danger ...

DENNIS ODA / DODA@STARADVERTISER.COM The sailfin tang, the striped fish in the front with the orange tail pictured here at the Waikiki Aquarium, is an herbivore that eats invasive algae. Collector sea ...