Class Chondrichthyes includes chimaeras, sharks and rays. The skeletons of these fish are composed of cartilage and do not contain true bone although the notochord is calcified to form bone-like vertebrae. They are also distinguished from the bony fish in lacking a swim bladder and bony operculum protecting the gills. The scales do not overlap and the tail is typically asymmetric, having a larger upper lobe.
Subcategories 12
Related categories 2
Sites 22
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- Dedicated Shark Site Provides detailed information on many shark species and general information about sharks.
- Introduction to the Chondrichthyes UCMP Berkeley's introduction to the cartilaginous fish, including sharks.
- Shark Research Program at the University of Florida Museum of Natural History Attack statistics, breaking news about sharks, information about Great white and Megamouth sharks, shark attack file, and a commercial shark fishery observer program.
- Shark-L Archives of the e-mail group for discussion of sharks and cartilaginous fish.
- GoldenStateImages - Sharks of the California Coast Photography of sharks found off the California coast includes blue shark, and mako shark.
- Shark Research Committee Research of North America's Pacific Coast sharks, including White Shark (Carcharodon carcharias) diet, distribution, behavior, encounters, and attacks.
- Sharks Gallery Photos of sharks with no text.
- Shark Foundation Facts, images, and information on projects and activities organized by the foundation. In English and German.
- Infoplease - Sharks! Myths, facts, and statistics, how to avoid a shark attack, and the shark hall of fame.
- Shark Photographs Underwater photographs and information about many species of sharks and rays.
- Cartilaginous Fishes: Class Chondrichthyes The most distinctive feature of this class is that their entire skeleton, including the skull, is cartilaginous without any true bone. The class include the sharks and rays, many of which are described here.
- Torpedoes, Skates and Rays: Order Batoidei Characteristics of these fish in the subclass Elasmobranchii, which includes the Torpedoes, Skates, Sting Rays and Devil Rays.
- Swell Shark: Cephaloscyllium ventriosum Photograph of an embryo of this species developing inside its “mermaid purse” egg case.
- Shark Wikipedia provides a great deal of information about sharks, their biology and classification, accompanied by photographs and diagrams.
- Chondrichthyes Wikipedia article on this class of cartilaginous fish, their anatomy, biology and taxonomy.
- Chondrichthyes Provides information on the fossil record of sharks and their kin, their life history, ecology, systematics and morphology.
- ReefQuest A comprehensive source of information on the biology of sharks and rays including behavioral studies.
- Class Chondrichthyes Taxonomic information on cartilaginous fishes: sharks, rays and chimaeras.
- Alessandro De Maddalena: Shark Specialist Personal page with details of his research on sharks, his work as a marine wildlife illustrator, collaborations and publications.
- IUCN SSC Shark Specialist Group Works to achieve science-based management of sharks, rays and chimaeras. Provides conservation status and details of their conservative strategies.
- MOTE: Shark Biology & Conservation An independent marine research institution. Provides information on their current projects.
- American Elasmobranch Society An organization devoted to the study and conservation of sharks, rays, skates and chimeras.