For the first few months there were next to no recreation facilities on the island, and the men amused themselves by shooting at sharks that swam into the lagoon.

It had been presumed that the sharks were trapped within the lake, but this was found to be incorrect in the late 1960s, when it was discovered that they were able to jump along the rapids of the San Juan River ( which connects Lake Nicaragua and the Caribbean Sea ), almost like salmon.

He played an English surfer with a fear of sharks, who interrupts a conversation between two main characters to ask whether there were any sharks in the sea.

Until the 16th century, sharks were known to mariners as " sea dogs ".

Similarities among the physical remains and the extreme size of both the great white and C. megalodon led many scientists to believe these sharks were closely related, and the name Carcharodon megalodon was applied to the latter.

As of April 2007, great white sharks were fully protected within of New Zealand and additionally from fishing by New Zealand-flagged boats outside this range.

They did however have certain traits separating them from cartilaginous fishes, traits that would become pivotal in the evolution of terrestrial forms: With the exception of a pair of spiracles, the gills did not open singly to exterior like in sharks, rather they were hidden behind a bony operculum.

They were probably preyed upon by predatory whales and sharks, including Carcharocles megalodon.

Job sharks charged a fee for signing up workers in the logging camps and employment agencies were known to cheat itinerant workers, with bribes sometimes paid to periodically fire entire work crews, generating repetitive fees.

Convicts were dissuaded from escaping by the poisonous snakes in the interior of the island and the sharks patrolling the 30 km to the mainland.

In one such documented incident, they were observed scavenging on a whale carcass alongside great white sharks, Carcharodon carcharias.

Fossil sharks that were apparently very similar to modern sevengill species are known from Jurassic specimens.

His contemporaries Theodore Gill and Edward Drinker Cope suggested it was instead related to the hybodonts, which were the dominant sharks during the Mesozoic era.

The frilled sharks off southern Africa were described as a different species, C. africana, in 2009.

Until the 16th century, sharks were known to mariners as " sea dogs " and the oceanic whitetip, the most common ship-following shark, exhibits dog-like behaviour when its interest is piqued: when attracted to something that appears to be food, its movements become more avid and it will approach cautiously but stubbornly, retreating and maintaining a safe distance if driven off, but ready to rush in if the opportunity presents itself.

After Hurricane Katrina, many bull sharks were sighted in Lake Ponchartrain.

Grizzly bear teeth, fresh water pearls, sea shells, sharks ' teeth, copper and even small quantities of silver were turned into beautifully crafted pieces.

Most goblin sharks that have been caught were from Japan ( where it was first discovered ), specifically in an area between Tosa Bay and Boso Peninsula.

In 2003, more than a hundred goblin sharks were caught off the northwest coast of Taiwan, an area in which they have previously not been found.

Reportedly, the sharks were caught a short time after an earthquake occurred in the area.

Later the same year in April, several goblin sharks were seen swimming in shallow waters in the Japanese Sea.

Grey reef sharks were the first shark species known to perform a threat display, a stereotypical behavior warning that it is prepared to attack.

Three sharks were built for the film.

The oldest known fossils of bony fish are about 420 million years ago, which are also transitional fossils, showing a tooth pattern that is in between the tooth rows of sharks and bony fishes.

Under this broader definition, the earliest known sharks date from more than 420 million years ago.

Like most extinct sharks, C. megalodon is also primarily known from its fossil teeth and vertebrae.

* Squatiniformes: Also known as angel sharks, they are flattened sharks with a strong resemblance to stingrays and skates.

* Carcharhiniformes: Commonly known as groundsharks, the species include the blue, tiger, bull, grey reef, blacktip reef, Caribbean reef, blacktail reef, whitetip reef and oceanic whitetip sharks ( collectively called the requiem sharks ) along with the houndsharks, catsharks and hammerhead sharks.

* Lamniformes: They are commonly known as the mackerel sharks.

It is not yet known whether the medial pallium plays a similar role in even more primitive vertebrates, such as sharks and rays, or even lampreys and hagfish.

* Over 130 species of fish including bull sharks ( carcharhinus leucas ), rays, cobblers ( cnidoglanis macrocephalus, also known as Swan River Catfish.

They are also known for their Coconut crab ( Birgus latro ), the world's largest land crab, and hammerhead sharks, manta rays, barracuda and as a breeding ground for green turtles and hawksbill turtles ; in older times, its dominant land predator was the crocodillian Aldabrachampsus.

Such a lifestyle is reminiscent of sharks of the genus Isistius, which is known as the Cookiecutter shark because of the circular wounds it leaves in the skins of whales and large fish that it has bitten in passing.

Catsharks are ground sharks of the family Scyliorhinidae, with over 150 known species.

Since its discovery in 1976, only a few megamouth sharks have been seen, with 54 specimens known to have been caught or sighted as of 2012, including three recordings on film.

Lamniformes is an order of sharks commonly known as mackerel sharks ( which may also refer specifically to the family Lamnidae ).

These sharks hunt individually or in groups, and have been known to pin schools of fish against the outer walls of coral reefs for feeding.

The original " Bruce " sharks rotted behind sheds on the lower lot of Universal Studios, the only pieces that were salvageable were the chromoly tube frames.

Two thirds of the island is surrounded by an elkhorn coral barrier reef, providing an ecosystem for over 250 fish species and a variety of other marine life including spotted eagle rays, nurse sharks and lemon sharks, and juvenile Blacktip reef sharks and Whitetip reef sharks.

Salary-buying loan sharks continued to operate in some southern states after World War Two because the usury rate was set so low that licensed personal finance companies could not do business there.

The phylum contains about 7000 living species, making it the second-largest grouping of deuterostomes ( a superphylum ), after the chordates ( which include the vertebrates, such as humans, sharks and frogs ).

Evidence for this etymology comes from the OED, which notes the name " shark " first came into use after Sir John Hawkins ' sailors exhibited one in London in 1569 and used the word " sharke " to refer to the large sharks of the Caribbean Sea.

However, some researchers have hypothesized that the reason the proportion of fatalities is low is not because sharks do not like human flesh, but because humans are often able to escape after the first bite.

They have few natural predators, although animals such as crocodiles, killer whales, and sharks pose a threat to the young, and a dugong has also been recorded to have died from trauma after being impaled by a sting ray barb.

The shark was released on 31 March 2005 after she bit two soupfin sharks in the exhibit, both of which later died.

The cartilaginous fish ( e. g. sharks and rays ) split from the other fishes about 420 million years ago and lack both lungs and swim bladders, suggesting that these structures evolved after that split.

Beamen displays his raw athletic talent and starts to run and pass extremely successfully and leads the sharks to the playoffs after winning three of the last four games of the season, bringing the Sharks to 9-7 on the year.

" One ( story ) about the old commercial fisherman who fought the swordfish all alone in his skiff for 4 days and four nights and the sharks finally eating it after he had it alongside and could not get into the boat.

Copulation lasts for several minutes, after which the sharks separate and resume their regular behaviors.

Even today, after the rise of corporate payday lending in the United States, unlicensed loan sharks continue to operate in immigrant enclaves and low-income neighborhoods.

Another study at Rangiroa Atoll in French Polynesia found that, after more than three years, around 40 % of the originally tagged sharks were still present on the same reef where they were first captured.

Both of them are pool sharks, and after the game turns into a farce, a fight ensues.

Russell Franklin ( Samuel L. Jackson ) at first has no need for her project anymore, but after giving it some thought decides to return with McAlester to Aquatica, a remote former submarine refueling facility that, thanks to Franklin's company was turned into a research facility to study sharks and a cure for Alzheimer's disease, to survey the experiment for himself.

All bony fishes, some sharks and rays have yolk sacs at some stage of development, with all oviparous fished retaining the sac after hatching.

They go up down and around structures that evolved after the common ancestor with sharks.

The main attraction is Atlantis Submarine Voyage by Sealife, which features " submarine " vehicles used to travel through the 1 million litre tank to view marine exhibits and a Lego recreation of the lost city of Atlantis, which is guarded by live sharks, as well as touch pools and other interactive areas located after the main ride element of the 1, 230m < sup > 2 </ sup > indoor attraction.

The lone survivor washed up on the coast of Llewdor babbling of shipmates being consumed by sharks and others swallowed by a great squid after being crushed in its tentacles.

It is said that after Kruger National Park, the Great White sharks attract some of the highest number of tourist to South Africa for any singular activity.

There are no reliable data on their life span, but fully grown Greenland sharks have been recaptured 16 years after being tagged.