Objetive:

To determine the fish species in four estuarine habitats (Arracachal, Eneal, Manglar and areas without vegetation) in the Atrato river delta.

Methodology:

Fish were collected between November 2012 and July 2013, with gill nets and throw nets.

Results:

A total of 1,262 individuals belonging to 52 species distributed in 27 families and 11 orders were captured. Three species of marine stragglers, 21 marine migrants, 7 estuarine, 1 semi-anadromous, 4 freshwater migrants and 16 freshwater stragglers.

Conclusions:

Although no significant differences were found in the fish abundance or fish richness among estuarine habitats, the composition of the species was different and was mainly associated with salinity.

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