Sharksonline's Blog

Hammerhead Shark

Posted on: March 10, 2010

Above the Scalloped hammerhead  shark

There are nine known species of the hammerhead shark and here they are

Scalloped hammerhead

Great hammerhead

Smooth hammerhead

Whitefin hammerhead

Scalloped bonnethead

Winghead shark

Scoophead

Bonnethead or shovelhead

Smalleye hammerhead

1. And they range from 0.9 to 6 m (3.0 to 20 ft) long. All the species have a head that gives it a resemblance to a flattened hammer. The hammer-like shape of the head was thought to help sharks find food. However the positioning of the eyes allow for it to see 360 degree that is the best known vision of any shark. Like all sharks, hammerheads have electroreceptory sensory pores to help it find food. Because of it hammer like head hammerheads can sweep for prey more effectively. These sharks have been able to detect an electrical signal of half a billionth of a volt. They are also known to form schools during the day sometimes in groups of over 100. In the evening like other sharks, they become solitary hunters.

2. The hammerhead shark females giving birth to live young. Like other sharks, the male transferring sperm to the female through one of two claspers. In 2007, the bonnethead shark was found to be capable of asexual reproduction by herself without the need for a male. This was the first shark known to do this.

4. Hammerhead sharks are known to eat a large range of things, including fish, other sharks, squid, octopus, and crustaceans. Stingrays are a favourite. They are also known to eat their own young.

5. One of the nine known species of hammerhead, three can be dangerous to humans and they are the scalloped, great and smooth hammerheads. The great and the scalloped hammerhead are listed on the World Conservation Union’s (IUCN) 2008 Red List as endangered.

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

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