What Fish Does a List of Fish Without Scales Contain?

Catfish, sharks, rays, chimaeras, skates, moray eels, sturgeons, paddlefishes, salifin blennies, combtooth blennies, hagfishes, and lampreys are among the fish that lack scales. Many of these species have developed substitutes for scales.

Sharks and rays are examples of cartilaginous fish, which lack both scales and bones. Their cartilage-based skeletons are malleable, allowing some of them to reach huge sizes. The whale shark, which can reach a length of 30 feet, is the biggest fish in the world.

Another enormous species is the manta ray, which can grow to a width of over 22 feet and weigh over 3,000 pounds. The hides of these fish feel like sandpaper because they lack the scales that normal fish have; instead, they have denticles, which are essentially microscopic teeth.

Fish called sturgeons have scutes rather than scales. More frequently found in crocodilians, these bone plates. They have the capacity to mature well and develop to enormous sizes. The lake sturgeon has an 82-year lifespan on average.

Fish that are in their infancy include lampreys. Their mouths are spherical and without a jaw; rows of teeth border them. Some parasites use their jaws to latch onto another fish, rip a hole in the flesh, and ingest bodily fluids.

Misha Khatri
Misha Khatri is an emeritus professor in the University of Notre Dame's Department of Chemistry and Biochemistry. He graduated from Northern Illinois University with a BSc in Chemistry and Mathematics and a PhD in Physical Analytical Chemistry from the University of Utah.


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