Involved in oxygen transport from gills to the various peripheral tissues. Heterotetramer of two alpha chains and two beta chains. Red blood cells. This fish has five hemoglobins: Hb C, Hb O, Hb 1, Hb 2 and Hb 3. Hb 0 presents the strongest Bohr effect while Hb 1 presents the weakest Bohr effect. Belongs to the globin family.