Huh? Sharks are not mammals nor crustaceans or any of their sub category. They are not Arthropods (horseshoe crabs, sea spiders, lobsters, crabs, shrimp, and barnacles), Cnidarians (sea anemones, corals, sea pens, jellyfish, box jellies, and hydrozoans), Echinoderms (starfish, brittle stars, sea urchins, sand dollars, sea cucumbers, crinoids, and sea daisies), Hemichordates (acorn worms and Pterobranchia), Lophophorates (brachiopods, bryozoans, and horseshoe worms), Mollusks (bivalves, gastropods, cephalopods), Sponges (calcareous, glass, demosponges), and Worms (roundworms, ribbonworms, flatworms, spiny-headed, segmented, arrow, jaw, horsehair, phallus, and peanut worms).
What are sharks if not a fish?
Maybe they a different genus or species?
or Phylum? Did you ever think about that?? A whole new phylum?
No, you only think about yourself.
‘Sharks are a group of elasmobranch FISH’
-Wikipedia
They’re fish. You’re right. Sharks are Cartilaginous fishes.