What Are the principle Forms ofFish?
Fish are categorized into three key sorts primarily based on their own skeletal framework and respiratory methods:
Bony Fish (Osteichthyes): This category incorporates species like salmon, trout, and cod, accounting for around ninety six% of all fish species. Their skeletons are made of bones, and they have operculum (gill handles) for respiration.
Cartilaginous Fish (Chondrichthyes): Fish like sharks, rays, and skates tumble into this group, characterized by skeletons crafted from cartilage. They normally have multiple gill slits devoid of covers.
Jawless Fish (Agnatha): Primitive fish like lampreys and hagfish belong to this classification. As opposed to other fish, they deficiency jaws and depend upon suction or other distinctive feeding procedures.