That, Steve, is a nice example of a yellowstripe scad (Selaroides leptolepis), alternatively named the smooth-tailed trevally. Aside from the relatively small scutes just ahead of its tail, the main giveaways separating this species from other small, yellow-striped Carangids (trevallies and jacks) such as the oxeye scad (Selar boops) are the relatively small eye and prominent black spot on the upper edge of the operculum. In fact, the genus name Selaroides means "like Selar," in reference to the similarity between these two fishes. Yellowstripe scad are common throughout the tropical Indo-Pacific region from the Persian Gulf to Northern Australia, Vanuatu and north to Japan. They grow to a maximum length of around 9 inches. Their diet consists of small planktonic crustaceans and fish. S. leptolepis forms large demersal schools in estuaries and inshore areas over soft-bottom habitats at depths shallower than 150 feet, which makes them a common target for inshore trawl fisheries. (Between 100,000 and 200,000 tons of this species are landed annually worldwide!) Like some other carangids, juvenile yellowstripe scad sometimes associate with large jellyfish, using them for protection and as a foraging base, a sort of biological FAD, if you will.