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.
Starfish are classified in the Class Asteroidea. All asteroids have several arms arranged around a central disk. Asteroidea are known as the true stars.. These animals are in a separate class from the brittle stars and basket stars, which have a more defined separation between their arms and their central disk.