IUCN threat status:

Least Concern (LC)

Comprehensive Description

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  Common names: drift-fish (English), derivante (Espanol), flotador (Espanol)
Psenes sio Haedrich, 1970

Two-spine driftish

Body elongate (deeper in juvenile) compressed, not soft and flabby; snout blunt; eye moderate, with ring of fatty tissue around it; operculum thin, with 2 short spines; mouth small, at front; jaw teeth small, conical, in 1 row, adult lower jaw with knife-like teeth; teeth on front and sides of roof of mouth, and base of gill arches; 2 scarcely separate dorsal fins, XI-XII + I, 23-25, spines shorter than rays, its origin before, or, in large specimens, over pectoral origin;  pectoral long, bluntly pointed (long but shorter in juvenile),16-18 rays; pelvics originate under or before pectoral base, attached to the abdomen, fold into a groove, fins long in juvenile; anal fin II weak spines, 23-24; tail fin deeply forked in adult, rounded tips in juvenile; branched mucous canal along length of flank; scales very small, very thin, cover bases of median fins,  on top of head in a narrow band, reach only to between eyes; lateral line high on body.

(Preserved juvenile) light brown, with 3 indistinct dark bars; 1st  dorsal dark, other fins whitish; inside mouth yellow; inside operculum black; iris grey.

Size: 28 cm.

Habitat: oceanic.

Depth: 0-500 m.

Southern Baja and the mouth of the Gulf of California to Chile, and the Galapagos.


Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

© Shorefishes of the tropical eastern Pacific online information system. www.stri.org/sftep

Source: Shorefishes of the Tropical Eastern Pacific Online Information System

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