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Guide to Sea of Cortez Fish Species

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Guide to travel, activities, organisms, and ecology of the Sea of Cortez

Bicolor, or Blue and Yellow Chromis
Chromis limbaughi

Sea of Cortez bicolor chromis limbaughi

 

Description and Size
To 4 inches.  Dusky blue body with a diagonal yellow rear yellow band that begins at the forward base of the dorsal fin, and extends to the base of the caudal peduncle, including the caudal fin. 

Identifying Features
Brilliant coloration in the juveniles, with the same characteristic diagonal yellow swath as adults.  Scattered blue spots on the head. 

Range
Central to southern Sea of Cortez, and Pacific coast of Mexico.  

Habitat
Prefers deep reefs, most abundant from 80 - 300 feet.

Behavior and Ecology
The bicolor chromis is more likely than most other Sea of Cortez damselfish species to form aggregations along reefs.  Usually there are fewer than 20 individuals in an aggregation, often along reef prominences such as boulders or jutting walls.  These chromis are also less territorial than other damselfish and allow scuba divers to enter their territories without aggressive behavior.    

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Updated August 28, 2009

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