Sharks: Ocean's Super Swimmers!

Sharks are super old fish that have swum in our oceans for over 400 million years! That's even older than dinosaurs! They come in all sorts of amazing shapes and sizes. Some are as tiny as your hand, while others, like the whale shark, are as long as a school bus! They have been around for so long because they are perfectly built for life in the sea.

Sharks live in every ocean on Earth, from the super cold waters near the North and South Poles to the warm, sunny seas near the equator. You can find them in shallow coastal waters, deep ocean trenches, and even near coral reefs. Some sharks, like the Greenland shark, can live for hundreds of years in the icy Arctic waters!

Most sharks are carnivores, which means they love to eat meat! Their diet depends on the type of shark. Some eat small fish and squid, while bigger sharks might munch on seals, sea lions, or even other sharks. The gentle whale shark is a filter feeder, meaning it swims with its mouth open, slurping up tiny plankton and small fish like a giant underwater vacuum cleaner.

Sharks have incredible senses! They can smell a tiny drop of blood from far away and can even sense the electrical signals from other animals. Their skin feels like sandpaper because it's covered in tiny, tooth-like scales called dermal denticles.

These help them swim faster and smoother through the water. They also have rows and rows of teeth, and when one tooth falls out, another one moves up to take its place!