Rainbow seaperch (Hypsurus caryi)

Classification (WoRMS)

Full classification as recorded by WoRMS: Kingdom: Animalia · Phylum: Chordata · Class: Teleostei · Order: Ovalentaria incertae sedis · Family: Embiotocidae · Genus: Hypsurus.

Accepted name: Hypsurus caryi · Authority: (Agassiz, 1853) · Taxonomic status: accepted · AphiaID: 240717.

Synonyms and superseded combinations recorded for this taxon: Embiotoca caryi Agassiz, 1853.

Source: World Register of Marine Species (WoRMS) — https://www.marinespecies.org/aphia.php?p=taxdetails&id=240717 (CC BY 4.0). Accessed 2026-09-25.

Biology and life history (FishBase)

Measured values published by FishBase for Hypsurus caryi. Only fields the database actually holds for this species are shown; these are database values, not aquarium guidance.

Maximum length: 30 cm · Depth range: 1–50 m · Habitat zone: demersal · Body shape: short and / or deep · Vulnerability index: 20 of 100 · Fishery importance: commercial.

FishBase notes: Adults occur in rocky shores, often at edges of kelp beds, occasionally over sand but not in surf (Ref. 2850). Viviparous, female carries the developing young (Ref. 205). Caught mostly by rocky shore fishermen. Aggregates in the fall.

Source: FishBase species summary (SpecCode 3633) — https://www.fishbase.se/summary/Hypsurus-caryi.html (CC BY-NC 3.0 — non-commercial use only). Accessed 2026-09-25.

Distribution and occurrence records (GBIF)

176,285 georeferenced occurrence records for Hypsurus caryi are published through GBIF from 2 countries or marine areas. The map above plots 11 distinct locations from a sample of 3,000 records, omitting 10 inland records that carry an institution's coordinates rather than a collection site; it shows where the species has been observed and reported, not a modelled range.

Most records by country or area: United States of America (176,280); Mexico (5).

The full country table, WoRMS marine regions and the sampling notes are on this species' Distribution page.

Source: GBIF Occurrence Search (taxonKey 2389310) — https://www.gbif.org/occurrence/search?taxon_key=2389310&has_coordinate=true (records CC0 / CC BY); WoRMS distribution records (MarineRegions) — https://www.marinespecies.org/aphia.php?p=taxdetails&id=240717 (CC BY 4.0); Natural Earth 110m basemap — https://www.naturalearthdata.com/ (public domain). Accessed 2026-09-25.

Description and natural history (Wikipedia)

Hypsurus comes from the greek word "hyps" for "high," the latin word "urus" (a kind of ox,) and the greek word "cary," meaning nut, apparently a reference to the fish's shape. The specific name honors Thomas Cary (1824-1888), a business man and amateur naturalist who was also the brother-in-law of Louis Agassiz who procured specimens that confirmed that this species was viviparous.

This species is the only known member of its genus, but has also been placed in the genus Embiotoca.

Description

The rainbow surfperch displays a typical surfperch outline, with a deep body and laterally compressed profile. Rainbow surfperch are one of the most colorful surfperch, having red bands from the top to the side of the body, and a grey, pink, or orange body, with an orange face adorned with blue spots. The fins are yellow to red-orange, and the tips of the first spines, as well as a spot on the soft dorsal fin and the anal fin are black. The pectoral fin is also lightly striped, and the edge is a vibrant blue.

They are sometimes confused with the striped surfperch (Embiotoca lateralis,) as both fish display rainbow coloration and blue dots on the face, but striped surfperch tend to be much darker and less elongated.

This species grows to a maximum length of 30.5 cm TL.

Range

The rainbow surfperch is found along the Pacific coast of North America from Cape Mendocino, California to Northern Baja California, Mexico.

Biology and ecology

Rainbow surfperch prefers rocky shores and substrate over sandy ones, and is never found in the surf zone, preferring the edges of kelp forests or seagrass beds down to depths of about 40 m, with some recorded as deep as 50 m. This species primarily eats small snails, crustaceans, and polychaete worms, as well as eating algae and small fish. Young fish may also perform a cleaner fish role, eating parasites off larger fish. They have also been known to sift through the sand looking for prey.

Like other surfperch, the species is viviparous, giving birth to live offspring. The fish mate in large aggregations during the fall, and birth nine to 29 offspring that are around 6.8 cm in shallow or tidal waters after seven to nine months of gestation.

Relation to humans

There is no targeted commercial fishery for the species. They can be a common catch for anglers fishing in rocky areas or near kelp forests. As they are one of the smaller species of surfperch, and also admired for their color, they are often thrown back.

The conservation status of the fish has not been formally evaluated.

Source: Wikipedia: Rainbow surfperch — https://en.wikipedia.org/wiki/Rainbow_surfperch (CC BY-SA 4.0). Accessed 2026-09-25.