Shark

shark

Sharks are big fish that live in the sea. They have sharp teeth and a strong body. Sharks can swim fast and hunt for food. Some sharks are small, and some are very big! They eat fish and other sea animals. Sharks have been around for a long time, even before dinosaurs! They help keep the ocean healthy by eating sick fish.

Did You Know?

Some sharks can grow to be as long as a bus!

Shark Types

There are many kinds of sharks. Some are great white sharks, and some are tiny dogfish.

Shark Senses

Sharks have great senses. They can smell food from far away!

What Shark Does

Sharks swim in the ocean.

They eat fish and squid.

Sharks help keep the sea clean.

They can be very fast swimmers.

Some sharks can jump out of the water.

Sharks can live for many years.

More About Shark

Sharks have been in the sea for a long time. They first swam in the ocean over 400 million years ago! That is much longer than people have been on Earth.

Sharks are important for the ocean. They help keep fish populations healthy. If there are too many fish, it can hurt the ocean.

Some sharks are in danger because of fishing and pollution. We need to help protect them so they can live for a long time.

How Topics Connect

graph TD A["Sharks Overview"] --> B["Characteristics"] B --> C["Elasmobranch Fishes"] B --> D["Ribless Endoskeleton"] A --> E["Classification"] E --> F["Division Selachii"] E --> G["Sister Group to Batomorphi"] A --> H["Historical Timeline"] H --> I["Devonian Period"] H --> J["Early Jurassic"]

What Do These Words Mean?

elasmobranch:A type of fish that has a skeleton made of cartilage instead of bone.

cartilaginous:Made of cartilage, which is a flexible tissue that is softer than bone.

endoskeleton:The internal skeleton of an animal, made of bone or cartilage.

morphology:The study of the form and structure of living things.

Jurassic:A period in Earth's history that occurred about 200 million years ago.