Question

Which fish does not have scales?

Answer 1

Fish:

1. Fish are aquatic vertebrates with gills but no digitized limbs, such as fingers or toes.
2. Hagfish, lampreys, and other fish species are a few examples.

Fish that don't not have scales:

1. Cyclostomes have no scales.
2. The living aquaculture systems are the cyclostomes, which are primitive in many ways but specialized in others.
3. They are an altered and degenerate outgrowth of the Ordovician primitive vertebrate stalk.
4. They are saprophytic or scavengers on fish as adults.