triangular teeth. Their extra-tall, pointed dorsal fins are easily identifiable. Most hammerhead species are fairly small and are considered harmless to humans. However, the great hammerhead's ...

That is why shark teeth are the most abundant vertebrate fossil material on the Earth and in the sea. Scalloped hammerhead on the ... like hammerheads and great whites must swim to pass water ...

There are 10 species of hammerhead shark, with the largest being the Great Hammerhead, which grows up to 20 feet, experts say. Shark attacks are rare, and hammerhead attacks even more so ...