Fish With Strong Nostrils & Stronger Teeth

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Learn About: Sharks

Some people are afraid of sharks, but I’m not. All of my shark friends are very friendly. Truth is, we need sharks in the ocean. Why? Well, sharks are predators and eat smaller fish. Bigger fish eat smaller fish which keeps fish populations in balance, and this is very important. They eat fish, octopuses (oh my!), sea lions, and even other sharks.

There are about 450 to 500 different kinds of sharks swimming in the ocean. You might not know this, but sharks are fish. They have fins, and breathe air through their gills. Their skin looks smooth but they have scales, which makes their skin feel like sandpaper. Unlike most fish, they don't have bones. A shark's skeleton is made of cartilage—the same stuff that makes up your ear and part of your nose.

Sharks have very cool qualities. They have a very strong sense of smell, and as much as two thirds of their brains are used for smelling. A shark's sense of smell is about 10,000 times better than a person's! Also, much like you, sharks lose their baby teeth to make room for new ones. They have rows of teeth, and whenever they lose one, a replacement tooth moves forward to fill the gap.

Marmo’s Tip: Sharks are captured for their fins and meat. Ask your parents not to buy any shark products. We need them to stay in the ocean!