Are Ray Finned Fish Cartilaginous?

Are Ray Finned Fish Cartilaginous? The actinopterygians, or ray-finned fish, are one of the two major clades of bony fish (Osteichthyes), the other being the lobe-finned fish, or Sarcopterygians. The Chondrichthyes (cartilaginous fish) are the extant sister clade of the Osteichthyes. How do cartilaginous fishes differ from ray-finned fish? Technically, the most obvious disparity between