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...h a white underbelly and a darker top side. The turbot's skin is rough and scaleless, but covered in numerous small, bony tubercles.

...creatures that lack jaws, true vertebrae, and paired fins. They have soft, scaleless skin and numerous, small eyes. They are known for their ability to produce

...hose of sharks, and an elongated spindle-like body that is smooth-skinned, scaleless, and armored with 5 lateral rows of bony plates called scutes.

...ed, with one atrium and one ventricle. The skin of agnathans is smooth and scaleless.