pez
Nota de aplicación
General term referring to animals from several evolutionary lines and thus not properly a taxonomic group. The term refers to aquatic animals found in the fresh and salt waters all over the world, characterized by being cold-blooded, living and breathing primarily in the water throughout their lives, possessing gill slits, a notochord or skeletal supporting rod, a dorsal hollow nerve cord, a tail, scales covering the body, and two sets of paired …