The tiger shark is a vicious predator that can grow to pretty big sizes. It has tiger-like markings on a dark back with an off-white underbelly. Pups have spotted markings that grow together to form stripes that fade with maturity. It has a large, thick body with a blunt snout. The first dorsal fin is much longer than the second. The caudal fin is long and pointed. There is a dermal ridge along the back between the two dorsal fins.
Tiger sharks have a special gill slit behind the eyes that provides oxygen flow directly to the eyes and brain. It also has a very good sense of smell, electroreceptors sensitive to electric currents in the water, and very keen eyesight. Their teeth are very serrated, razor sharp and curved. The teeth are the same in the upper and lower jaw. The teeth are located in rows, which rotate into use as needed.
The first two rows are used in obtaining prey, the other rows rotate into place as they are needed. As teeth are lost, broken, or worn down, they are replaced by new teeth that slide into place.
They can grow up to 20 feet long, but most are about 10 feet. They will eat anything that they can catch alive. There are reports of tiger sharks attacking humans, but they do not seek them out. They can dive down to 1200 feet into the water and are found worldwide in warm seas. They swim at average speeds of 2.4 mph, but can swim in very fast bursts, but cannot sustain them for long periods of time.
The tiger shark is a very interesting creature that should be respected in the shark world, for they can tear something apart in seconds. If I could go into that...