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.
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Personal page with details of his research on sharks, his work as a marine wildlife illustrator, collaborations and publications.
An organization devoted to the study and conservation of sharks, rays, skates and chimeras.
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.
Provides information on the fossil record of sharks and their kin, their life history, ecology, systematics and morphology.
Wikipedia article on this class of cartilaginous fish, their anatomy, biology and taxonomy.
Taxonomic information on cartilaginous fishes: sharks, rays and chimaeras.
Provides detailed information on many shark species and general information about sharks.
Myths, facts, and statistics, how to avoid a shark attack, and the shark hall of fame.
UCMP Berkeley's introduction to the cartilaginous fish, including sharks.
Works to achieve science-based management of sharks, rays and chimaeras. Provides conservation status and details of their conservative strategies.
A comprehensive source of information on the biology of sharks and rays including behavioral studies.
Wikipedia provides a great deal of information about sharks, their biology and classification, accompanied by photographs and diagrams.
Facts, images, and information on projects and activities organized by the foundation. In English and German.
Underwater photographs and information about many species of sharks and rays.
Research of North America's Pacific Coast sharks, including White Shark (Carcharodon carcharias) diet, distribution, behavior, encounters, and attacks.
Attack statistics, breaking news about sharks, information about Great white and Megamouth sharks, shark attack file, and a commercial shark fishery observer program.
Archives of the e-mail group for discussion of sharks and cartilaginous fish.
Photos of sharks with no text.
Photograph of an embryo of this species developing inside its “mermaid purse” egg case.
Characteristics of these fish in the subclass Elasmobranchii, which includes the Torpedoes, Skates, Sting Rays and Devil Rays.
An organization devoted to the study and conservation of sharks, rays, skates and chimeras.
Works to achieve science-based management of sharks, rays and chimaeras. Provides conservation status and details of their conservative strategies.
Personal page with details of his research on sharks, his work as a marine wildlife illustrator, collaborations and publications.
A comprehensive source of information on the biology of sharks and rays including behavioral studies.
Taxonomic information on cartilaginous fishes: sharks, rays and chimaeras.
Provides information on the fossil record of sharks and their kin, their life history, ecology, systematics and morphology.
Wikipedia article on this class of cartilaginous fish, their anatomy, biology and taxonomy.
Provides detailed information on many shark species and general information about sharks.
Wikipedia provides a great deal of information about sharks, their biology and classification, accompanied by photographs and diagrams.
Photograph of an embryo of this species developing inside its “mermaid purse” egg case.
Characteristics of these fish in the subclass Elasmobranchii, which includes the Torpedoes, Skates, Sting Rays and Devil Rays.
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.
UCMP Berkeley's introduction to the cartilaginous fish, including sharks.
Archives of the e-mail group for discussion of sharks and cartilaginous fish.
Attack statistics, breaking news about sharks, information about Great white and Megamouth sharks, shark attack file, and a commercial shark fishery observer program.
Facts, images, and information on projects and activities organized by the foundation. In English and German.
Myths, facts, and statistics, how to avoid a shark attack, and the shark hall of fame.
Photos of sharks with no text.
Research of North America's Pacific Coast sharks, including White Shark (Carcharodon carcharias) diet, distribution, behavior, encounters, and attacks.
Underwater photographs and information about many species of sharks and rays.
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- Recently edited by merlin1
- Recently edited by merlin1