Q:

How many sharks are there in the world?

A:

Quick Answer

There are approximately 470 known species of shark in the world, but it's impossible to count the exact number of individual sharks on the planet. World Wildlife Fund estimates that more than 100 million sharks are killed each year for their fins.

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How many sharks are there in the world?
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Full Answer

As part of its shark monitoring program, WWF has identified more than 450 whale sharks and has tagged almost 30. Sharks, like other predatory species, reproduce slowly and in smaller quantities than other fish, which are prey species that rely on high reproductive rates to continue their species. Shark populations are dropping because of pollution, over-fishing of their food sources and habitat alteration.

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Related Questions

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    What is the fastest shark in the world?

    A:

    Of the 400 or so shark species on the planet, the shortfin mako shark is thought to be the fastest, capable of swimming at speeds from 22 to 60 miles per hour. Makos are aggressive, however attacks on humans are rare because the species usually stays in the open ocean.

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  • Q:

    What is a food chain for a tiger shark?

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    Tiger sharks exist at the top of the food chain, and they prey on a wide variety of species, including fish, sea turtles and other sharks. Additionally, tiger sharks prey on sea-dwelling birds, catching them as they land on the water’s surface. Mollusks such as sea snails, conchs and whelks also serve as prey for the opportunistic sharks. Tiger sharks are also scavengers that have been known to eat garbage.

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  • Q:

    What are the characteristics of a tiger shark vs. a great white?

    A:

    Great white sharks grow up to 21 feet long, have a lifespan of approximately 70 years and live in all the world's oceans. In contrast, tiger sharks grow to about 16 feet, have a lifespan of approximately 50 years and are only found in temperate climates, especially around islands in the Pacific. Though somewhat visually similar, the tiger shark also has characteristic tiger-stripe markings, though these are often faded in mature adults.

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  • Q:

    How many sharks are left in the world?

    A:

    There is no way to accurately count the number of remaining sharks as there are more than 400 known species of shark spread out all around the world. However, what researchers do know is that an estimated 100 million sharks are killed each year which exceeds what the different species need to recover.

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