The Sea Chubs, Nibblers, and Halfmoons (Kyphosidae): The Kyphosidae Family which is made up of sea chubs, nibblers, and halfmoons, are compressed, oval shaped, omnivorous fishes with small teeth.

They feed on benthic algae, plankton and small invertebrates. Seven species are known in the Sea of Cortez from three subfamilies.

The members of the Kyphosidae Family found in Mexican waters and represented in the fish identification section of this website include: the California Opaleye, Girella nigricans; the Cortez Chub, Kyphosus elegans; Gulf Opaleye, Girella simpllicidens; Rainbow Chub or Rainbow Sea Chub, Sectator ocyurus; and Striped Sea Chub or Blue Bronze Sea Chub, Kyphosus analogus.