What is ragged-tooth shark?

The ragged-tooth shark, also known as the sand tiger shark or gray nurse shark, is a species of shark found in the coastal waters of many oceans, including the Atlantic and Indian oceans. They have a distinctive appearance, with their pointed teeth protruding from their mouths even when it is closed, giving the impression that they have a "ragged" or "uneven" set of teeth.

Ragged-tooth sharks can grow up to 3.2 meters (10.5 feet) in length and weigh around 160kg (350 pounds). They are a slow-moving species of shark and are usually solitary or found in small groups. They are also known to be docile and harmless to humans, despite their formidable appearance.

Ragged-tooth sharks are mainly nocturnal and feed on a diet of fish, squid, and octopus. They use their sharp teeth to crush their prey and swallow it whole. What's interesting is that ragged-tooth sharks have two spinal columns – one in the upper body and another in the lower body – which allows them to bend and twist their bodies in a unique way, making them agile swimmers.

Like many shark species, ragged-tooth sharks are threatened by overfishing, habitat destruction, and accidental capture in fishing nets. Conservation efforts are being made to protect these sharks and their habitats, including establishing marine protected areas and reducing fishing quotas.