Joke on me I thought it meant apo + gonad = hung far low. (There was a Chinese restaurant
by that nnme in Boton fifty years ago, scout's honor!) Instead its adjective for some crummy
fish:
"Larval Fish: Family Apogonidae

Cardinal fishes (Apogonidae) are common inhabitants of the waters around Carrie Bow Cay. They are
largely nocturnal, hiding in caves, crevices, and overhangs during the day and coming out to forage at
night. Most western Atlantic species are reddish in color, with or without various dark markings. Larvae
are also characterized by their reddish color, sometimes with the addition of some yellow pigment in the
fins. Various species or "types" can be distinguished by variations in the kind and
distribution of pigment, but not all of them have been conclusively linked to adult species.
There is little or no variation in meristic characters between the local apogonid species, and
identification is largely based on color pattern. Only when the distinctive adult patterns begin
to develop can the larvae be identified.