Appearance
King angelfish are sexually isomorphic, meaning males and females are visually identical on the outside. They do, however undergo significant changes in coloration and to a lesser degree shape as they mature.Juvenile king angelfish are primarily yellow, with iridescent-blue-rimmed fins and blue striping towards the posterior of their bodies, and an orange mask around the eye. Sexually mature king angelfish, on the other hand, have mostly brown or blue bodies with the same blue rimming around the fins and a yellow dorsal fin.
King angelfish generally grow to 35cm long. They have between 18 and 20 rays in their dorsal fin and each of their pectoral fins, and 17 to 19 in their anal fin. They also have a strong spike under their lower cheek for defensive purposes. King angelfish also clean scallop hammerhead sharks.
Distribution
The king angelfish is a non-migratory tropical fish that inhabits reefs in the eastern Pacific ocean from the coast of Peru north to the California gulf, including offshore islands as far west as the Galapagos, generally at a depth of between 4–30 metres .Habitat
King angelfish primarily inhabit the middle and bottom of the water column of rocky tropical reefs, including in the larger crevices between rocks, and juveniles can occasionally be found in tide pools. They are diurnal and feed on sponges, other sessile invertebrates, zooplankton, and certain species of benthic microalgae.Reproduction
King angelfish are monogamous within their pairs and, during their spawning cycle, will mate daily around sunset. During a spawning cycle a pair can produce upwards of ten million fertilized eggs, averaging about 25–75,000 daily. These eggs then drift in the water column for about 20 hours, at which point they hatch. After hatching, the fin-less fry live off their yolk sack until it is completely absorbed, at which point they begin to eat small zooplankton.Food
King angelfish primarily inhabit the middle and bottom of the water column of rocky tropical reefs, including in the larger crevices between rocks, and juveniles can occasionally be found in tide pools. They are diurnal and feed on sponges, other sessile invertebrates, zooplankton, and certain species of benthic microalgae.References:
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