A dentist is the health care professional who specializes in the diagnosis, prevention, and treatment of diseases and conditions of the oral cavity (including the teeth, gums and other soft and hard tissues of the mouth). Dentists, also known as 'dental surgeons', help us maintain a bright healthy smile.
The dogfish sharks are classified in the phylum Chordata Chordata, phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development.
1 Phylum: Mollusks (Soft-bodied animals that sometimes have a hard shell. 2  Includes: snails, octopus, squid, clams, oysters, and mussels.). 3  Phylum: Echinoderms (Often spiny animals, with several arms reaching out from the center of its body. Includes: starfish, sea cucumbers and sea urchins.). 2  Phylum: Arthropods, SubPhylum: Crustaceans. 3  Crabs, lobsters, shrimp, barnacles and many other animals belong to the phylum arthropods. 4  In fact, 75% of all animals belong to the phylum arthropoda (which also includes spiders and insects).