What Are the most crucial Forms ofFish?
Fish are categorized into three key varieties primarily based on their own skeletal construction and respiratory systems:
Bony Fish (Osteichthyes): This classification involves species like salmon, trout, and cod, accounting for around ninety six% of all fish species. Their skeletons are made of bones, and they may have operculum (gill addresses) for breathing.
Cartilaginous Fish (Chondrichthyes): Fish like sharks, rays, and skates slide into this group, characterised by skeletons manufactured from cartilage. They typically have many gill slits without having handles.
Jawless Fish (Agnatha): Primitive fish like lampreys and hagfish belong to this class. Unlike other fish, they absence jaws and rely on suction or other exceptional feeding strategies.