【實用書籍app】Ichthyology Fish Definition|最夯免費app-綠色工廠好玩App

also known as Fish Science, is the branch of biology devoted to the study of fishes. This includes bony fishes (Osteichthyes), cartilaginous fishes (Chondrichthyes), and jawless fishes (Agnatha). While a large number of species have been discovered and described, approximately 250 new species are officially described by science each year. According to FishBase, 32,200 species of fish had been described by March 2012.[1] There are more species of fishes than the combined total of all other vertebrates: mammals, amphibians, reptiles and birds