chondrichthyes

sharks and rays belong to the class chondrichthyes.

chondrichthyes are characterized by a cartilaginous skeleton.

the evolution of chondrichthyes dates back to the devonian period.

marine biologists study the diversity of chondrichthyes species.

unlike bony fish, chondrichthyes lack swim bladders.

rough scales called denticles cover the skin of chondrichthyes.

many species of chondrichthyes are currently threatened by overfishing.

the anatomy of chondrichthyes includes multiple gill slits.

fossils provide evidence of ancient chondrichthyes existence.

chondrichthyes generally utilize internal fertilization for reproduction.

electroreception is a sensory ability found in chondrichthyes.