Ichthyology is the branch of zoology studies fishes. This includes the bony fishes (Osteichthyes), the cartilaginous fishes (Chondrichthyes) such as sharks and rays, and the jawless fishes (Agnatha).
... in Manchu and refers to Amur River (sahaliyan ula). Its proper Ainu name, Karafuto (樺太) or Karaftu, was restored to the island by the Japanese during ...