| Common names: sargo (English), burro (Espanol), sargo (Espanol) |
Anisotremus davidsonii (Steindachner, 1876)
Sargo, Xanthic sargo
Body deep, compressed, back high; head short, blunt; mouth small, low, ~ horizontal, lips fleshy; inside mouth not red; teeth in bands on jaws, outer ones larger, conical, none on center roof of mouth; a pair of conspicuous pores plus a central groove under the chin; preopercle finely serrated; dorsal continuous but deeply notched, 4th spine longest, XI-XII, 14-16; anal III, 9-11, 2nd spine long but not greatly so; pectoral fins relatively short, not, reaching origin of anal; tail forked; scales moderate to large, rough, over entire body and head except front of snout, lips and chin, on membranes between dorsal and anal soft rays; rear lines of scales oblique rows above lateral line; lateral-line scales 54-62.
Overall silvery with yellowish tinge; a prominent blackish bar on side at level of outer part of pectoral fin; upper margin of operculum black; black spot on outer pectoral base; juveniles have 2-3 blackish stripes on the side and lack a spot at the tail fin base.
Size: attains 60 cm, but common to 30 cm.
Habitat: found on rocky, weed-covered reefs, sometimes forming schools.
Depth: 5-61 m.
Central California to central Baja, the Gulf of California.
Global Endemism: All species, East Pacific endemic, TEP non-endemic
Regional Endemism: All species, Tropical Eastern Pacific (TEP) non-endemic, Temperate Eastern Pacific, primarily, California province, primarily, Continent, Continent only
Climate Zone: North Temperate (Californian Province &/or Northern Gulf of California), Northern Subtropical (Cortez Province + Sinaloan Gap), Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
Regularity: Regularly occurring
Type of Residency: Year-round
Inshore/Offshore: Inshore, Inshore Only
Water Column Position: Near Bottom, Bottom, Bottom + water column
Habitat: Reef (rock &/or coral), Reef only, Rocks, Reef associated (reef + edges-water column & soft bottom)
FishBase Habitat: Demersal
Habitat and Ecology
Habitat Type: Marine
Water temperature and chemistry ranges based on 1 sample.
Depth range (m): 3 - 10
Temperature range (°C): 20.583 - 20.583
Nitrate (umol/L): 0.441 - 0.441
Salinity (PPS): 34.246 - 34.246
Oxygen (ml/l): 5.165 - 5.165
Phosphate (umol/l): 0.472 - 0.472
Silicate (umol/l): 4.140 - 4.140
Depth range (m): 3 - 10
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.
Recorded at 40 meters.
Non-Migrant: No. All populations of this species make significant seasonal migrations.
Locally Migrant: No. No populations of this species make local extended movements (generally less than 200 km) at particular times of the year (e.g., to breeding or wintering grounds, to hibernation sites).
Locally Migrant: No. No populations of this species make annual migrations of over 200 km.
Diet: mobile benthic crustacea (shrimps/crabs), mobile benthic gastropods/bivalves, sponges/seasquirts/bryozoa
Life History and Behavior
Molecular Biology and Genetics
Barcode data: Anisotremus davidsonii
Below is a sequence of the barcode region Cytochrome oxidase subunit 1 (COI or COX1) from a member of the species.
See the BOLD taxonomy browser for more complete information about this specimen and other sequences.
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Download FASTA File
Statistics of barcoding coverage: Anisotremus davidsonii
Public Records: 5
Specimens with Barcodes: 5
Species With Barcodes: 1
CITES: Not listed
IUCN Red List Assessment
Red List Category
Red List Criteria
National NatureServe Conservation Status
Rounded National Status Rank: NNR - Unranked
NatureServe Conservation Status
Rounded Global Status Rank: GNR - Not Yet Ranked
Relevance to Humans and Ecosystems