King angelfish in Los Cabos

How to recognize it

Adults have a deep, flat body and a small mouth. They are velvety blue-gray with blue scale centers, and have a single narrow white bar on the side, level with the rear edge of the pectoral fin. The tail is yellow. On the nape, just in front of the dorsal fin, there is a dark patch with small pale-blue spots. The dorsal and anal fins have a bluish base, a pink to reddish outer band and blue edges, and end in filaments. The pelvic fins are white in males and pale yellow in females. Juveniles are orange in front and brown behind, with 5 to 6 narrow blue bars on the side, a pair of blue bars on the head around a broad brown bar through the eye, and an orange tail.

Biology

The king angelfish lives only in the tropical eastern Pacific, from Isla Guadalupe and southern Baja through the Gulf of California to northern Peru, including the Revillagigedo, Galápagos, Malpelo and Cocos islands. It is a resident of rocky reefs and coral areas from 1 to 80 m deep, and young fish sometimes turn up in tide pools. At Cabo Pulmo it was rated common and appeared in 75 to 100% of underwater fish counts made between 1987 and 1998.

It feeds by day on sponges, plus algae, other attached invertebrates and plankton. Adults usually live in pairs that share a home range rather than defending a strict territory, and they spawn in late summer. Juveniles pick parasites off other fish, and adults have been seen cleaning sharks. Holacanthus angelfishes are thought to start life as females and change to males as they grow; for this species FishBase says that is still awaiting confirmation.

Seeing them from the boat

The king angelfish is a fish for snorkelers and divers, not anglers. It is common on the rocky reefs around Los Cabos and Cabo Pulmo, often in pairs. It is not a sport fish.

It has a small mouth and feeds mostly on sponges, so it is rarely hooked. If one ever comes up on a bait, unhook it gently and put it straight back: it is protected in Mexico. Sport fishing is not allowed inside Cabo Pulmo National Park.

Rules & conservation

Protected in Mexico. If one is ever hooked, release it right away.

Don't confuse it with

The Cortez angelfish (Pomacanthus zonipectus) is bigger and gray, with a broad yellow band behind the head and a narrower yellow band behind the pectoral fin, and no white bar. Its juveniles are black with six curved yellow bars and thin blue bars between them, while young king angelfish are orange in front and brown behind with thin blue bars. The Clarion angelfish (Holacanthus clarionensis) is orange-brown with an orange tail; it lives mainly at the Revillagigedo Islands and only strays to southern Baja.

Questions

By Max VargasTop Anglers, Cabo San Lucas · international judge at big game fishing world championships · reviewed October 2026

Sources

• Smithsonian Shorefishes of the Eastern Pacific: Holacanthus passer
• FishBase: Holacanthus passer
• Reef Life Survey: King angelfish
• The ETYFish Project: Pomacanthidae
• Gijón-Díaz et al. 2017, ornamental reef fish under federal protection in Mexico (Rev. Biol. Trop.)
• Villarreal-Cavazos et al. 2000, fishes of Cabo Pulmo reef (Rev. Biol. Trop.)
• Gatins et al. 2024, king angelfish genome (GigaByte)
• Smithsonian Shorefishes of the Eastern Pacific: Clarion angelfish
• NOM-059-SEMARNAT-2010, 2019 annex (DOF)
• Aburto-Oropeza et al. 2011, fish recovery at Cabo Pulmo (PLoS ONE)

Top illustration: Top Anglers. Photos: iNaturalist contributors, credited on each photo.