Involved in oxygen transport from gills to the various peripheral tissues. Hb 1 is a heterotetramer of two alpha-1 and two beta chains. Hb 2 is a heterotetramer of two alpha-2 and two beta chains. Red blood cells. This fish has two hemoglobins: Hb1 and Hb2. They display the Bohr and root effects. Belongs to the globin family.