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.
There are 5 classes: Branchiopoda (fairy shrimp, water fleas) Cephalocarida (small crustaceans) Malacostraca (isopods, amphipods, krill, crabs, shrimp, lobsters) Maxillopoda (copepods, barnacles) Remipedia (small, recently discovered crustaceans) Subphylum Uniramia This is the largest of the subphyla.rabs and Amphipods. Phylum Arthropoda This is the largest and most successful of the animal phyla, with over 1 000 000 species identified to date and an estimated 1 000 000 000 000 000 000 (1 quintillion) individuals alive today.