Fish · La Saladita, Guerrero

Mexican Nightsergeant

Abudefduf declivifrons

Spanish: petaca mexicana

Mexican Nightsergeant (Abudefduf declivifrons)
Photographed by elam2 on iNaturalist

Abudefduf declivifrons, commonly known as the Mexican nightsergeant, is a species of damselfish in the family Pomacentridae native to the eastern Pacific Ocean. It is known only from Mexico, where it ranges from the Gulf of California to Acapulco. It is typically found in surge-exposed rocky reefs at a depth of 1 to 5 m (3 to 16 ft). It is an oviparous species, with individuals forming distinct pairs during breeding and males guarding and aerating eggs. The...

TaxonomyActinopterygii › Blenniiformes › Pomacentridae
Local records32 research-grade observations within about 50 km of La Saladita (the survey box also takes in Zihuatanejo, Ixtapa and Troncones)
Global records525 on iNaturalist
Most recent records2024 – 2026
Months of the 8 most recent records
JanFebMarAprMayJunJulAugSepOctNovDec
Recent local sightings

Interactive card with more photos, sounds and similar species Fish guide iNaturalist Wikipedia

Cite as: “Mexican Nightsergeant (Abudefduf declivifrons) at La Saladita”, La Saladita Field Guide, lasaladita.com/species/abudefduf-declivifrons/, updated 2026-09-26. Observation counts and months come from iNaturalist research-grade records within about 50 km of 17.8375°N, 101.7606°W (the survey box also takes in Zihuatanejo, Ixtapa and Troncones); summary text from Wikipedia where present.