What Are the principle Varieties ofFish?
Fish are categorized into a few principal types dependent on their skeletal composition and respiratory devices:
Bony Fish (Osteichthyes): This class includes species like salmon, trout, and cod, accounting for approximately 96% of all fish species. Their skeletons are created of bones, and they've got operculum (gill handles) for respiration.
Cartilaginous Fish (Chondrichthyes): Fish like sharks, rays, and skates fall into this team, characterized by skeletons product of cartilage. They commonly have several gill slits without addresses.
Jawless Fish (Agnatha): Primitive fish like lampreys and hagfish belong to this category. Contrary to other fish, they lack jaws and trust in suction or other special feeding solutions.