#acanthopterygii

• Acanthopterygian — A term designating teleost fishes of the superorder Acanthopterygii, characterized by rigid, unjointed spiny rays in the anterior portions of the dorsal and anal fins, as well as a closed swim bladder (physoclistous). They constitute the most ecologically diverse and evolutionarily advanced group of modern fishes, occupying a vast array of marine and freshwater niches.