by Peter Rowland | Sunday, November 8, 2020
Bony Fishes (Class: Actinopterygii) The ray-finned fishes Actinopterygii are the largest assemblage of all vertebrate groups, with over 29,000 species known. Together with the Sarcopterygii, the lobe-finned fishes and tetrapods, they are the bony fishes or...
by Peter Rowland | Sunday, November 1, 2020
Fishes There are about 28,000 existing species of fish, and they are placed in five different classes. The classes are commonly referred to as hagfish, lampreys, cartilaginous fish, ray-finned fish, and lobe-finned fish. Fish range in size from the 14m whale shark to...
