Shark

Sharks occur in over 400 different varieties. Each type of shark has a distinct appearance, diet, and behavior. Sharks may be found in all four oceans on the planet. Some sharks can fit inside a fish tank, while others are smaller than a school bus. Sharks come in a wide range of hues. Their skin tone usually makes it easier for individuals to blend in with their surroundings. However, certain sharks that dwell in the ocean’s deepest regions have sections that light at night. While some sharks can survive in freshwater, most sharks dwell in saltwater. Sharks all have different characteristics that make them special or make them unique. Sharks are a type of fish. Sharks and common fish have several similarities as well as differences. The cartilage that makes up a shark’s skeleton. Bones make up the skeleton of fish. The tough, flexible material found in people’s ears and noses is cartilage. Sharks have gills, just like other fish. Fish breathe through their gills. People use their lungs to absorb oxygen from the air, unlike fish. Fish use their gills to draw oxygen from the water. Sharks and fish need water to pass over their gills to acquire enough oxygen. Most sharks need to swim in water with a very high current to keep the water moving.