Calamus brachysomus

Pacific porgy
Calamus brachysomus
Calamus brachysomus, Gulf of California, Mexico, Photo: Rick Stuart-Smith
Calamus brachysomus
Calamus brachysomus, Machalilla, Ecuador, Photo: Graham Edgar
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Calamus brachysomus
Calamus brachysomus


Tropical Eastern Pacific


High silvery body with a relatively steep head profile and a pointed snout. Scales on upper sides with blue spots, creating rows of spots along body, and tail with a narrow dark margin. Generally found over sandy bottoms and the edges of rocky reefs, with the young found in very shallow waters on reef flats and in bays with mixed sand and rubble bottoms.


Max Size: 61 cm

Sea Temperature Range: 15.9-29.6°C

Depth: 3-80m

Habitat Generalization Index: N/A

Also referred to as the SGI (Species Generalisation Index), this describes the habitat niche breadth of the species. Species with values less than 15 are found in a relatively narrow range of reef habitat types (specialists), while those over 25 may be found on most hard substrates within their range (generalists). Learn more here.

Conservation and Rarity

IUCN Status: Not Evaluated

Occurrence: Infrequent (4.9% of sites)

Occurrence describes how often the species is found on surveys within its distribution. It is calculated as the % of reef sites surveyed by RLS divers across all the ecoregions in which the species has been observed

Abundance: Several (7 per transect)

Abundance is calculated as the average number of individuals recorded per RLS transect, where present.

Edit by: Joe Shields