Hi, Adrian. First, from the perspective of a fisheries scientist, let me reinforce the idea of using sabiki rigs: They're definitely the best way to catch weird little oobly-goobly fishes that most anglers seldom see. The little golden beauty you caught is a juvenile golden trevally, Gnathanodon speciosus, related to other members of the jack family, such as amberjack and pompano. Adult goldens (the IGFA all-tackle record is 32½ pounds, from western Australia in 2002) are much more elongate and silver, with faint vertical bars. Golden trevally are native to both sides of the Pacific, as far south as Colombia in the eastern Pacific. However, this species also seems to have passed through the Panama Canal to the Atlantic. Juveniles often live among the tentacles of jellyfish, and many times you'll see them swimming ahead of sharks and other large pelagic animals. Adults are common in deep lagoons and nearshore reefs, from the surface down to depths of about 130 feet. Particularly in southern Mexico and Central America, golden trevally are caught in some numbers by artisanal fishermen; you can see them sold fresh (and sometimes salted) in local markets.
— Milton Love