Sharksonline's Blog

Blacktip shark

Posted on: May 19, 2010

Above the Blacktip shark

1. The black tip shark is found worldwide in the tropical and subtropical waters. In the Atlantic and Indian Ocean, the western Pacific ocean. Most blacktip sharks are found in water less than 30 m (100 ft) deep. It may dive to 64 m (210 ft). The Favored habitats are muddy bays, island lagoons, and the drop-offs near coral reefs. Although an individual may be found some distance offshore, blacktip sharks are not found in oceans waters.

2. The blacktip shark has a robust, streamlined body with a long, pointed snout and relatively small eyes. They have five gill slits but are longer than a normal size shark. The jaw has 15 rows or both sides. They are gray to brown above and white below. With a white stripe running along the sides. They have a blacktip only on one fin. The maximum known length of 2.8 m (9.0 ft), though 1.5 m (4.9 ft) is more typical, and a maximum known weight of 123 kg (271 lb).

3. Juveniles. In Terra Ceia Bay, Florida, a nursery area for this species, juvenile blacktips form aggregations during the day and disperse at night. They aggregate most strongly in the early summer when the sharks are youngest, suggesting that they are seeking refuge from predators.

4. Like the spinner shark, the blacktip shark is known to leap out of the water and spin three to four times about its axis before landing.

5. Fish make up some 90% of the blacktip shark’s diet. A wide variety of fishes have been recorded as prey for this species: sardines, herring, anchovies, ladyfish, sea catfish, cornetfish, flatfish, threadfins, mullet, mackerel, jacks, groupers, snook, porgies, mojarras, emperors, grunts, butterfish, tilapia, triggerfish, boxfish and porcupinefish. They also feed on rays and skates, as well as smaller sharks such as smoothhounds and sharpnose sharks. Crustaceans and cephalopods are occasionally taken. They hunt at dawn and dusk. They also have been known to have a feeding frenzies when large quantities of food are suddenly available.

6. Likes most shark the blacktip is a  viviparity and gives birth to 4-7 pups every other year. Making use of shallow coastal nurseries that offer plentiful food and fewer predators.
Mating occurs from spring to early summer, and the young are born at around the same time the following year after a gestation period of 10–12 months.  The age at maturation is 4–5 years for males and 7–8 years for females. The lifespan is at least 12 years.

7. There are reports of blacktip sharks showing curiosity towards divers, but remaining at a safe distance. it is not regarded as highly dangerous to humans. However, they may become aggressive in the presence of food, and their size and speed invite respect. As of 2008 there have been 28 unprovoked attacks and one fatal and 13 provoked attacks by this species.

All of this info is from http://en.wikipedia.org/wiki/Blacktip_shark

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