| Johnlonginae | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Superorder: | Selachimorpha |
| Order: | Lamniformes |
| Family: | Odontaspididae |
| Subfamily: | † Johnlonginae Shimada, 2015 |
| Genera | |
Johnlonginae is an extinct subfamily of sand shark with two genera: Johnlongia and Pseudomegachasma . The latter genus is thought to have evolved from former. They are among the older sand sharks, and are only known from the Cretaceous period. [1]
The Lamniformes are an order of sharks commonly known as mackerel sharks. It includes some of the most familiar species of sharks, such as the great white, as well as more unusual representatives, such as the goblin shark and megamouth shark.
The sand tiger shark, grey nurse shark, spotted ragged-tooth shark or blue-nurse sand tiger, is a species of shark that inhabits subtropical and temperate waters worldwide. It inhabits the continental shelf, from sandy shorelines and submerged reefs to a depth of around 191 m (627 ft). They dwell in the waters of Japan, Australia, South Africa, the Mediterranean and the east coasts of North and South America. Despite its common names, it is not closely related to either the tiger shark or the nurse shark.
Sand sharks, also known as sand tiger sharks, grey nurse sharks or ragged tooth sharks, are mackerel sharks of the family Odontaspididae. They are found worldwide in temperate and tropical waters. The three species are in two genera.
Hákarl is a national dish of Iceland consisting of a Greenland shark or other sleeper shark that has been cured with a particular fermentation process and hung to dry for four to five months. It has a strong ammonia-rich smell and fishy taste, making hákarl an acquired taste.
Physogaleus is a small genus of prehistoric shark that lived from the Eocene to Miocene epochs.
The smalltooth sand tiger or bumpytail ragged-tooth is a species of mackerel shark in the family Odontaspididae, with a patchy but worldwide distribution in tropical and warm temperate waters. They usually inhabit deepwater rocky habitats, though they are occasionally encountered in shallow water, and have been known to return to the same location year after year. This rare species is often mistaken for the much more common grey nurse shark, from which it can be distinguished by its first dorsal fin, which is larger than the second and placed further forward. It grows to at least 4.1 m (13.5 ft) in length.
The crocodile shark is a species of mackerel shark and the only extant member of the family Pseudocarchariidae. A specialized inhabitant of the mesopelagic zone, the crocodile shark can be found worldwide in tropical waters from the surface to a depth of 590 m (1,940 ft). It performs a diel vertical migration, staying below a depth of 200 m (660 ft) during the day and ascending into shallower water at night to feed. Typically measuring only 1 m (3.3 ft) in length, the crocodile shark is the smallest living mackerel shark. It can be distinguished by its elongated cigar-shaped body, extremely large eyes, and relatively small fins.
The bigeye sand tiger is an extremely rare species of mackerel shark in the family Odontaspididae, with a possible worldwide distribution. A large, bulky species reaching at least 3.6 m (12 ft) in length, the bigeye sand tiger has a long bulbous snout, large orange eyes without nictitating membranes, and a capacious mouth with the narrow teeth prominently exposed. It can be distinguished from the similar smalltooth sand tiger by its teeth, which have only one lateral cusplet on each side, and by its uniformly dark brown color.
The scalloped bonnethead is a rare, little-known species of hammerhead shark in the family Sphyrnidae. Its other common names include the mallethead shark and the crown shark. It is found in tropical and subtropical waters in the eastern Pacific Ocean, from Mexico to Peru, and possibly as far north as the Gulf of California. It frequents inshore habitats over soft bottoms to a depth of 100 m, and also enters mangroves and estuaries.
The sand devil or Atlantic angel shark is a species of angelshark, family Squatinidae, native to the northwestern Atlantic Ocean. It occurs off the eastern United States, in the northern Gulf of Mexico, and possibly in parts of the Caribbean Sea. This bottom-dwelling shark is found in shallow inshore waters in summer and fall, and deep offshore waters in winter and spring. The sand devil's flattened body and enlarged pectoral and pelvic fins give it a ray-like appearance. There is a band of enlarged thorns running along the middle of its back. It is gray or brown in color, with scattered small dark spots. This species reaches 1.2–1.5 m (3.9–4.9 ft) in length.
The necklace carpetshark, also known as the varied carpetshark, is a carpetshark of the family Parascylliidae endemic to the waters off Australia's southern coast between latitudes 37°S and 41°S. It is found near the ocean floor over sand, rock, coral reefs, and kelp and seagrass beds at depths down to 180 m (590 ft). It is almost exclusively seen at night and spends the day hidden in caves or camouflaged on the ocean floor.
Shark tourism is a way for tourists to see sharks in the ocean rather than in an aquarium. It is a form of eco-tourism intended to show that local shark species are more valuable alive than dead. Instead of opting for a one time economic benefit of harvesting sharks for their body parts, communities are enabled to assist tourists who want to see live sharks. People can get close to the sharks by free- or scuba diving or entering the water in a protective cage.
Tulamben is a small fishing village on the north-east coast of Bali. It is among the most popular dive sites on Bali since the wreck of the Liberty, a US Army Transport ship torpedoed by a Japanese submarine in 1942 lies just off shore. During high-season, up to 100 divers descend to the wreck each day.
Carcharias is a genus of sand tiger sharks belonging to the family Odontaspididae.
Talofofo Bay is an inlet in the south-eastern coast of the island of Guam at the mouth of the Talofofo River in the village of Talofofo.
Odontaspis is a genus of sand shark with two extant species.
The Pacific smalltail shark is a species of requiem shark, in the family Carcharhinidae. It was described in 1898, but later mistakenly merged with Carcharhinus porosus. The mistake was corrected in 2011.
Ramón Bravo was a Mexican diver, photographer and underwater filmmaker. Bravo was the person who made the phenomenon of Sleeping sharks known to the world.
Sand Sharks is a 2011 American direct-to-video horror film directed by Mark Atkins about a horde of monstrous sharks that swim through sand and hunt people. It stars Corin Nemec, Brooke Hogan, Vanessa Lee Evigan, Eric Scott Woods, and Gina Holden.
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