Cortez angelfish

Lore & Background

Pomacanthus zonipectus was first formally described as Pomacanthodes zonipectus in 1862 by American ichthyologist Theodore Nicholas Gill, with the type locality given as San Salvador in El Salvador. Some authorities place this species in the subgenus Pomacanthus. The specific name zonipectus is a compound of zona meaning 'belt' and pectus meaning 'breast', referring to the dark-brown girdle on the breast behind the pelvic and pectoral fins.

Adults have the posterior half of the body covered by a matrix of crisscrossing lines, becoming yellowish-green in the tail, with a large yellow arc behind the pectoral fins and a bright yellow saddle across the nape. Juveniles have a brownish-black background with six vertical vivid yellow bands and parallel blue bars between them, with bright blue margins on the dorsal and pelvic fins. The species is diurnal and feeds mainly on sponges, also taking tunicates, algae, bryozoans, hydroids, and fish eggs. Adults are found in pairs that range widely, while solitary juveniles are territorial and also occur in tidal pools.

Reader's Guide

The Cortez angelfish is a moderately sized marine angelfish reaching about 46 cm in length, found from the northern Gulf of California to Peru, with vagrant records from southern California, the Galapagos Islands, Cocos Island, and Malpelo Island. It inhabits depths between 6 and 50 m and is diurnal, feeding primarily on sponges and other benthic organisms. Spawning occurs from midsummer to early autumn, with juveniles most abundant from August to November; the species appears to be monogamous. Its occasional appearance in the aquarium trade makes it of interest to marine hobbyists, though the article provides no further details on its captive care or conservation status. The species' distinctive juvenile coloration and the taxonomic history tied to Theodore Nicholas Gill contribute to its scientific significance.

Did You Know?

• The specific name zonipectus means 'belt breast', referring to a dark-brown girdle on the breast.
• Juveniles have six vivid yellow bands with parallel blue bars between them.
• Adults feed mainly on sponges, but also take tunicates, algae, bryozoans, hydroids, and fish eggs.
• It has been recorded as a vagrant from southern California, the Galapagos Islands, Cocos Island, and Malpelo Island.