The correct answer is Dogfish.Explanation:Dogfish belongs to the class Chondrichthyes of Pisces.Pisces belongs to the phylum chordata.Super class - Pisces is considered as true fishes and includes three main classes:CyclostomataChondrichthyesOsteichthyesClass - Cyclostomata:Class - Cyclostomata includes the round mouthed fishes.They are also called jawless fishes as they have sucking mouth without jaws.Example: Petromyzon (lamprey), Myxine (hagfish).Class - Chondrichthyes:Class - Chondrichthyes have over 600 species including sharks, rays and skates. They are called cartilaginous fishes due to the presence of a cartilaginous skeleton.Example: Scoliodon (dogfish), Pristis (sawfish), Trygon (sting ray).Class- Osteichthyes:Class- Osteichthyes includes bony fishes such as carps, catfishes, sardines, seahorse, etc.They have a bony skeleton.Example: Labeo (rohu), Exocoetus (flying fish), Remora (sucker fish).Additional InformationJellyfish belong to the phylum Coelenterata.Silverfish belong to the phylum Arthropoda.Starfish belong to the phylum Echinodermata.