Question

Which fish does not have scales on its body?

Answer 1

Fish:

1. Fish are aquatic vertebrates with gills but no digitized limbs, such as fingers or toes.
2. Cyclostomes have no scales.
3. Cyclostomes are vertebrates that have cranium enclosing the brain.
4. E.g. Lamprey, Hagfish.
5. The living aquaculture systems are the cyclostomes, which are primitive in many ways but specialized in others.
6. They have an altered and degenerate outgrowth of the Ordovician primitive vertebrate stalk.
7. They are saprophytic or scavengers on fish as adults.