Frilled Shark (Chlamydoselachus anguineus) is found near Europe, near southern Africa, and also in the western Pacific from Japan south to New Zealand. This long narrow shark reminds one of an eel. It can be over 6 feet long. This is a deep water species. The tail lacks a lower lobe. The teeth are pointed back, and the side gill slits connect on the throat.

There are two known species of frilled shark both in the genus Chlamydoselachus. This family appears limitd to the Atlantic and the Pacific Oceans. However, a recent discovery of a South African species extends into the western Indian Ocean. The members of this family are long narrow eel like creatures with continuous gill slits that wrap around the bottom of the neck.

Order Hexanchiformes contains two families. The frilled sharks (Chlamydoselachidae) and the six gilled and seven gilled sharks (Hexanchidae) belong here. There are only 6 known species in this order.

Sharks and rays (Elasmobranchi), cartilaginous fishes, deserve to be a class separate from the normal fish, in that they do not have a bone skeleton but rather a cartilage skeleton.

Fertilization is internal in this class which also separates them from the bony fish class. Although there are a few fresh water species, the majority of the species in this class are found in salt water. As of 2005, there were about 500 known species of sharks and about 600 known species of rays.

David Ebert, author of a recent book on sharks, rays, and chimaeras of California, counts a total of 988 described species in the class with about 150 additional species awaiting scientific description. He breaks down the described species to 410 species of sharks, 543 species of rays, and 35 species of chimaeras.

Many species of sharks face an uncertain future, as the Chinese purchase shark fins to make shark fin soup. It was estimated that 100 milllion sharks are killed each year for this purpose. However, recent estimates indicate the Chinese are reducing their consumption of this exotic soup.

Backboned Animals (Phylum Chordata) are the most advanced group of animals on earth. These animals are characterized by having a spinal cord or backbone. Most members have a clearly defined brain that controls the organism through a spinal cord. Fish, amphibians, reptiles, birds, and mammals are in this phylum.

Currently, some taxonomists believe that the fish should be divided into two groups (sharks and regular fishes) and that there are some other primitive groups in the phylum such as hagfish or lampreys.

Animal Kingdom contains numerous organisms that feed on other animals or plants. Included in the animal kingdom are the lower marine invertebrates such as sponges and corals, the jointed legged animals such as insects and spiders, and the backboned animals such as fish, amphibians, reptiles, birds, and mammals.

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