19 species of fishes collected in the coralline archipelagos of Islas del Rosario and San Bernardo, which are reported for the first time for the Colombian continental Caribbean, are described. Three of those species (Ichtyapus ophioneus, Calamopteryx goslinei and Apogon Ieptocaulus) had not been collected before in the southern Caribbean , being therefore new records for this section of the Sea. Biological and ecological information about the 19 species is given as well.