Outline of sharks

The following outline is provided as an overview of and topical guide to sharks: Sharks (superorder Selachimorpha) are a type of fish with a full cartilaginous skeleton and a highly streamlined body.

The earliest known sharks date from more than 440 million years ago, before the time of the dinosaurs.

[1] A shark, also called a "selachimorph", can be described as all of the following: List of sharks Subdivisions of the biological classification Selachimorpha include: Shark attack Sharks in captivity

A great white shark at Isla Guadalupe, Mexico
Diagram showing shark "family tree"
Identification of the 8 extant shark orders
Photo of front page of newspaper showing photo of large shark with open mouth
The Philadelphia Inquirer report of Jersey Shore shark attack
Photo of whale shark with silhouettes of human observers at bottom of picture
A whale shark in the Georgia Aquarium
Anatomical shark drawing showing snout, nostril, eye, spiracle, dorsal fin spine, first and second dorsal fins, precaudal pit, caudal fin, caudal keel, anal fin, clasper, pelvic fin, pectoral fin, gill openings, labial furrow, and mouth
The major features of sharks
Simplified diagram of shark net
Photo of single-masted boat at sea
Shark fishing boat off the Galapagos , Ecuador
One of the first species of shark to be protected was the grey nurse shark .
Photo of bearded man
Hans Hass, diving pioneer