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 and are the sister group to the rays.
Sharks are fishes. Like other fishes, sharks are cold-blooded, have fins, live in the water, and breathe with gills. A shark's skeleton is made of cartilage. A shark's fusiform (rounded and tapering at both ends) body shape reduces drag and requires minimum energy to swim.
The hammerhead sharks are a group of sharks that form the family Sphyrnidae, so named for the unusual and distinctive structure of their heads, which are flattened and laterally extended into a "hammer" shape called a cephalofoil.
The great hammerhead shark is the largest of all hammerhead species, reaching a maximum known length of 20 feet (6.1 m)1 and weight of 991 pounds (450 kg). ... Like other hammerhead species, great hammerhead sharks have long, serrated teeth and use their hammer-shaped heads to detect and eat prey.
The great white shark, also known as the white shark, white pointer, or simply great white, is a species of large mackerel shark which can be found in the coastal surface waters of all the major oceans.
Carcharodon carcharias, more commonly known as the great white shark, is
one of more than 450 shark species and is the largest of all predatory
sharks in the ocean today.
Adult great white sharks grow to a maximum size of approximately 20 feet
in length, weigh up to 6,600 pounds, and are estimated to live for 30
years.
The tiger shark is a species of requiem shark and the only extant member
of the genus Galeocerdo.
It is a large macropredator, Populations are found in many tropical and
temperate waters, especially around central Pacific islands.
Tiger sharks can grow up to 18 feet (5.5 m) long and 2,000 pounds (900 kg), making it one of the largest shark species. 2. Tiger sharks are named for the distinctive, gray vertical stripes or spots covering the sides of their bodies
| Family | Species | Common name |
|---|---|---|
| Lamnidae | C. carcharias | Great White Shark |
| Carcharhinidae | G. cuvier | Tiger Shark |
| Sphyrnidae | S. mokarran | Hammerhead Shark | Family summary | Species summary | Name summary |
|
They are in different families |
All are different species |
All have "shark" in their name |
Sharks/wikipedia
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