[2] Other common names for this shark include blunthead shark, light-tip shark, reef whitetip shark, and whitetip shark. This shark is unique among its relatives, with its slender body and blunt snout with tubular nasal flaps. The number of offspring is not correlated with female size; each female produces an estimated average of 12 pups over her entire lifetime. One study at Johnston Atoll found that none of the sharks examined had moved more than 3 km (1.9 mi) away from their original capture location over periods of up to a year. For example, the oceanic whitetip has declined by approximately 80 to 95 percent across the Pacific Ocean since the mid-1990s. Unusually, there is also a report of seven whitetip reef sharks adopting a cleaning posture (mouth agape and gills flared) in the midst of a swarm of non-cleaning hyperiid amphipods; the mechanical stimulation from the moving amphipods are thought to have evoked this behavior through their similarity to actual cleaner organisms. The mouth has a distinct downward slant (imparting a disgruntled expression to the shark), with short furrows at the corners. C. longimanus' most distinguishing characteristics are its long, wing-like pectoral and dorsal fins. [8][13][14] It is especially sensitive to natural and artificial low-frequency sounds in the 25–100 Hz range, which evoke struggling fish. They are a medium sized shark averaging about 9.8 ft (3 m) in length and weight up to 370 lb (170 … [2] In Hawaiian mythology, the fidelity (i.e. [5], The whitetip reef shark is one of the three most common sharks inhabiting the reefs of the Indo-Pacific, the other two being the blacktip reef shark (Carcharhinus melanopterus) and the grey reef shark (Carcharhinus amblyrhynchos). [2], The first dorsal fin is positioned well back on the body, closer to the pelvic than the pectoral fins. Whitetip reef sharks are cartilaginous fish that can be found in tropical oceans. The whitetip reef shark was first described by the German naturalist Eduard Rüppell as Carcharias obesus, in the 1837 Fische des Rothen Meere (Fishes of the Red Sea). 4. As its common name suggests, the Whitetip Reef Shark has white tips to some of the fins. Bloom size: 5.5 inches: Bloom time: Midseason: Plant Traits: Rebloom Diurnal: Bud Count: 10-15: Branching: 3-way: Bloom Traits: Edged Watermark: Bloom Form: Single: Color description: rose red with white and gold toothy edge a small pink watermark and a green throat Their average length is about 140 to 160 centimetres and the maximum reported length is 244 centimetres. Whitetip reef sharks grow to a maximum length of 7 feet (2.1 m) and weight of 40.3 pounds (18.3 kg). This species is viviparous, in which the developing embryos are sustained by a placental connection to their mother. Oceana joined forces with Sailors for the Sea, an ocean conservation organization dedicated to educating and engaging the world’s boating community. [17] Parturition occurs from May to August (autumn and winter) in French Polynesia, in July (summer) off Enewetak Atoll, and in October (summer) off Australia. [2][8], Important predators of the whitetip reef shark include tiger sharks (Galeocerdo cuvier), Galapagos sharks (Carcharhinus galapagensis), and possibly also silvertip sharks (Carcharhinus albimarginatus), though they usually occur at depths greater than those favored by whitetip reef sharks. Off Hawaii, these sharks may be found sheltering inside underwater lava tubes, while off Costa Rica they are often seen lying in the open on sandy flats. [5] Known parasites of the whitetip reef shark include the copepod Paralebion elongatus and the praniza (parasitic) larvae of the isopod Gnathia grandilaris. Blacktip reef sharks, Caribbean reef sharks, grey reef sharks and whitetip reef sharks mostly range below 5 km, and very rarely more than 10 km. An individual shark may rest inside the same cave for months to years. 5. (2009). It allows them to wriggle into narrow crevices and holes in the reef after prey other sharks can’t get at. However, spear fishers are at risk of being bitten by one attempting to steal their catch. This amazing fish is a very slim species. One of the most common sharks found on Indo-Pacific coral reefs, the whitetip reef shark occurs as far west as South Africa and as far east as Central America. An 80 cm (31 in) long whitetip reef shark has also been found in the stomach of a giant grouper (Epinephelus lanceolatus), though these groupers are unlikely to be significant predators of this species due to their rarity. Triaenodon apicalis Whitley, 1939. They are nocturnal, spending their nights hunting and their days resting in reef caves or sandy bottoms with large groups of fellow whitetips. 6. All Photographs At night, whitetip reef sharks become active and hunt for bottom-dwelling prey hiding in coral reef holes and crevices. Once abundant, whitetip reef shark numbers depleted noticeably from 1985 to 2005 due to overfishing in certain areas.2 Their shallow water habitats (33 to 131 feet/10 to 40 m) have made them susceptible to becoming bycatch in gillnet and longline fisheries, as well.3 Whitetip reef sharks are considered near threatened with extinction due to their small litter size, late age of maturity and coral reef habitat loss. Additionally, this shark matures late and has small litters. Each tooth has a single narrow, smooth-edged cusp at the center, flanked by a pair of much smaller cusplets. [17] In June 2018 the New Zealand Department of Conservation classified the whitetip reef shark as "Vagrant" under the New Zealand Threat Classification System.[26]. Primarily nocturnal, they shelter in caves by day, often communally (Randall 1977). With its slender shape, grey complexion and pronounced gills Each shark hunts for itself and in competition with the others in its group. The snout is flattened and blunt, with large flaps of skin in front of the nares that are furled into tubes. [2][5] The International Union for Conservation of Nature (IUCN) has assessed this species as Near Threatened, as its numbers have dropped in recent decades due to increasing, and thus far unregulated, fishing pressure in the tropics. The broad, triangular pectoral fins originate at or slightly before the level of the fifth gill slit. [5] Sexual maturity is reached at a length of around 1.1 m (3.6 ft) and an age of 8–9 years, though mature males as small as 95 cm (37 in) long have been recorded from the Maldives, suggesting regional variation in maturation size. The whitetip reef shark is one of the three most common sharks inhabiting the reefs of the Indo-Pacific, the other two being the blacktip reef shark (Carcharhinus melanopterus) and the grey reef shark(Carcharhinus amblyrhynchos). The whitetip reef shark is the most common shark species within the Galapagos Islands where they can be found around rocky reefs, under coral heads and in caves. Spiracles are usually present, but may be reduced in size or absent. Oceanic Whitetip Sharks are named for the distinctive white tips on their fins. The upper body is grey/brownish. Whitetip Reef Sharks at a depth of 14m, North Horn, Osprey Reef, Coral Sea, December 2000. ONR Technical Report 2, No. [2], Associated almost exclusively with coral reef habitats, whitetip reef sharks are most often encountered around coral heads and ledges with high vertical relief, and additionally over sandy flats, in lagoons, and near drop-offs to deeper water. On the other hand, if the female is willing, the pair settles side-by-side with their heads pressed against the bottom and their bodies at an upward angle. In the western and central Pacific, it occurs from off southern China, Taiwan, and the Ryukyu Islands, to the Philippines, Southeast Asia, and Indonesia, to northern Australia, and is also found around numerous islands in Melanesia, Micronesia, and Polynesia, as far as Hawaii to the north and the Pitcairn Islands to the southeast.

whitetip reef shark size

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