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shark : any of numerous mostly marine cartilaginous fishes of medium to large size that have a fusiform body, lateral branchial clefts, and a tough usually dull gray skin roughened by minute tubercles and are typically active predators sometimes dangerous to humans — Merriam-Webster   See also   OneLook


Sharks are a group of elasmobranch fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head. Modern sharks are classified within the clade Selachimorpha (or Selachii) and are the sister group to the rays. H

Sharks range in size from the small dwarf lanternshark (Etmopterus perryi), a deep sea species of only 17 centimetres (6.7 in) in length, to the whale shark (Rhincodon typus), the largest fish in the world, which reaches approximately 12 metres (40 ft) in length. Sharks are found in all seas and are common to depths of 2,000 metres (6,600 ft). They generally do not live in freshwater although there are a few known exceptions, such as the bull shark and the river shark, which can survive and be found in both seawater and freshwater. Sharks have a covering of dermal denticles that protects their skin from damage and parasites in addition to improving their fluid dynamics. They have numerous sets of replaceable teeth. — Wikipedia

Shark (Encyclopædia Britannica)

Sharks (Florida Museum of Natural History)

Sharks (One Zoom)
Shark (WolframAlpha)



Talks about Sharks (TED: Ideas Worth Spreading)
Articles about Sharks (Big Think)




Ichthyology, also called fish science, is the branch of zoology devoted to the study of fish, including jawless fish (Agnatha), cartilaginous fish (Chondrichthyes) and bony fish (Osteichthyes). According to FishBase, 33,400 species of fish had been described as of October 2016, with approximately 250 new species described each year. — Wikipedia

Ichthyology (Encyclopædia Britannica)

Florida Museum of Natural History (YouTube Channel)
Florida Museum of Natural History (Official Website)

Florida Program for Shark Research (Florida Museum of Natural History)
Pacific Shark Research Center




DDC: 597.3 Elasmobranchii: Sharks, Rays, etc. (Library Thing)
Subject: Sharks (Library Thing)

Subject: Sharks (Open Library)

LCC: QL 638.95.S7 Sharks (UPenn Online Books)
Subject: Sharks (UPenn Online Books)

LCC: QL638.95.S7 Sharks (Library of Congress)
Subject: Sharks (Library of Congress)

Subject: Sharks (WorldCat)




MERLOT: Multimedia Educational Resource for Learning and Online Teaching
OER Commons: Open Educational Resources



Zoologists and Wildlife Biologists (CareerOneStop, U.S. Department of Labor, Employment and Training Administration)


American Elasmobranch Society
American Society of Ichthyologists and Herpetologists
Zoological Association of America
Association of Zoos and Aquariums


Sharks (EurekaAlert, American Association for the Advancement of Science)
Sharks (bioRxiv: Preprint Server for Biology, Cold Spring Harbor Laboratory)
Sharks (JSTOR)
Sharks (Science Daily)
Sharks (Science News)
Sharks (
Sharks (NPR Archives)


Fun Facts About Shocking Sharks (Northeast Fisheries Science Center, NOAA Fisheries)
Fish & Sharks (Northeast Fisheries Science Center, NOAA Fisheries)


Shark (


More News … - latest science and technology news stories internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine.

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