What exactly are the most crucial Forms ofFish?
Fish are categorized into a few key varieties based on their own skeletal construction and respiratory systems:
Bony Fish (Osteichthyes): This group contains species like salmon, trout, and cod, accounting for approximately ninety six% of all fish species. Their skeletons are made of bones, and they have got operculum (gill covers) for respiratory.
Cartilaginous Fish (Chondrichthyes): Fish like sharks, rays, and skates drop into this group, characterised by skeletons made from cartilage. They ordinarily have a number of gill slits without handles.
Jawless Fish (Agnatha): Primitive fish like lampreys and hagfish belong to this class. Compared with other fish, they absence jaws and rely upon suction or other exclusive feeding methods.