Are All Fish Covered in Scales? Explore Scale-Free Species and Their Unique Features
Not all fish have scales. Most bony fish possess scales for protection and better movement in water. Some species, like clingfish and catfish, lack scales. They use a mucus layer or smooth skin instead. Scales come in two types: bony and placoid, each serving different roles in their aquatic environment. Scaled fish typically evolve from … Read more