| Common names: night-sergeant (English), petaca (Espanol), pintaño (Espanol) |
Abudefduf declivifrons (Gill, 1862)
Body relatively deep, oblong, compressed; 1 pair of nostrils; suborbital bone under eye usually not fused to cheek, its lower edge free, although sometimes partly joined to cheek and its lower border partly covered with scales; preopercle with smooth edge; mouth small, protrusible; teeth in single row, with notched or flat tips; gill rakers 19-23; a single continuous dorsal fin, XIII, 12-13; anal rays II, 10; pectoral rays 19; no projecting short spines at upper and lower base of tail fin; caudal fin forked; scales are moderately large and rough; body scaled, head largely scaled, as are the basal parts of the median fins; lateral line incomplete, ends under end of dorsal fin base; lateral-line scales 20-21.
Grey with 4-5 narrow whitish bars; most body scales with dark borders; narrow blackish bar or blackish wedge-shaped blotch on base of pectoral.
Size: reaches 18 cm.
Habitat: lives on rocky reefs exposed to wave action.
Depth: 0- 5 m.
Lower Baja and the central Gulf of California to Costa Rica; the Revillagigedos.
Has been considered a synonym of A. concolor, but a recent molecular study of Lessios et al 1995 (Copeia 1995: 277-288) confirmed that it is a separate species.
Global Endemism: All species, East Pacific endemic, Tropical Eastern Pacific (TEP) endemic
Regional Endemism: All species, TEP endemic, Continent + Island (s), Continent, Island (s)
Climate Zone: Northern Subtropical (Cortez Province + Sinaloan Gap), Northern Tropical (Mexican Province to Nicaragua + Revillagigedos), Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
Catalog Number: USNM 9332
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Collector(s): J. Xantus
Locality: Lower California, Cape San Lucas., Baja California Sur, Mexico, Pacific
Inshore/Offshore: Inshore, Inshore Only
Water Column Position: Bottom, Bottom only
Habitat: Reef (rock &/or coral), Reef only, Rocks, Reef associated (reef + edges-water column & soft bottom)
FishBase Habitat: Reef Associated
Habitat and Ecology
Water temperature and chemistry ranges based on 2 samples.
Depth range (m): 0.4 - 25.62
Temperature range (°C): 21.311 - 21.311
Nitrate (umol/L): 0.144 - 0.144
Salinity (PPS): 34.228 - 34.228
Oxygen (ml/l): 5.074 - 5.074
Phosphate (umol/l): 0.352 - 0.352
Silicate (umol/l): 3.264 - 3.264
Depth range (m): 0.4 - 25.62
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.
Diet: benthic microalgae, sessile crustacea, sessile worms, sessile molluscs
Life History and Behavior
Molecular Biology and Genetics
Statistics of barcoding coverage: Abudefduf declivifrons
Public Records: 1
Specimens with Barcodes: 5
Species With Barcodes: 1
CITES: Not listed
IUCN Red List Assessment
Red List Category
Red List Criteria