Answer:

Shark

Explanation:

- Skeleton is made of cartilage rather than bone. Five to seven gill openings on each side. Spiracles to aid in breathing. The upper jaw of elasmobranchs is not fused to their skull.

- This is the interpretation of the species as published in English, Sharks are a group of elasmobranch fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head.

Answer:

Sharks.

Explanation:

Sharks are a group of elasmobranch fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head. Modern sharks are classified within the clade Selachimorpha (or Selachii) and are the sister group to the rays.

Subclass: Elasmobranchii

Superorder: Selachimorpha