CrustaceansCrustaceans

Crustaceans are a type of Arthropod. The Crustaceans are a type of Arthropod. The name may not sound familiar, but you name may not sound familiar, but you

probably know them. You may even have probably know them. You may even have eaten one. eaten one.

Where do they live?Where do they live?

They live mostly in the ocean or They live mostly in the ocean or other waters. Most commonly other waters. Most commonly known crustaceans are the crab, known crustaceans are the crab, lobster and barnacle. lobster and barnacle.

What do they look like?What do they look like?

Crustaceans have a hard, Crustaceans have a hard, external shell which external shell which protects their body. protects their body. Crustaceans have a head Crustaceans have a head and abdomen. The head has and abdomen. The head has antennae which are part of antennae which are part of their sensory system. The their sensory system. The abdomen includes the heart, abdomen includes the heart, digestive system and digestive system and reproductive system.reproductive system.

The abdomen also has The abdomen also has appendages, such as appendages, such as legs, for crawling and legs, for crawling and swimming. Many swimming. Many crustaceans also have crustaceans also have claws that help with claws that help with crawling and eating. crawling and eating.

the Crab

There are about 10,000 different species of crab. The crab is native to all of the world's oceans. There are also freshwater crabs, and even some crabs that live on land. Crabs have a large, hard shell. 

The crab has 5 pairs of legs extending from the The crab has 5 pairs of legs extending from the side of its shell. The first pair of legs have claws side of its shell. The first pair of legs have claws or pincers used to catch and hold food. The or pincers used to catch and hold food. The other pairs of legs are used for walking. Most other pairs of legs are used for walking. Most crabs don't swim, they use their legs to walk. crabs don't swim, they use their legs to walk. However, some crabs such as the Blue Crab can However, some crabs such as the Blue Crab can use their legs as paddles to swim. use their legs as paddles to swim.

Lobster Lobsters are native to most oceans of the world.

The lobster habitat is rocky, sandy or muddy ocean bottom and they are generally found hiding in crevices or in burrows under rocks. Lobsters have five pairs of legs, the first pair of legs are claws used to catch and hold food. Lobsters have a large exoskeleton. As lobsters grow, the must molt to shed their old exoskeleton as they grow a larger new shell.

Krill are small crustaceans native to all oceans of the world. Krill are small shrimp-like creatures usually 1/4 inch to 2 inches in length. Krill are considered near the bottom of the food chain. They eat phytoplankton, single-celled plants that float in the seas near the surface. Krill then become food for fish and other animals that can't eat plants. They are an important food for sea creatures such as baleen whales, manta rays, whale sharks, crabeater seals, and a some seabirds. Most krill travel in large swarms with as many as 10,000 to 60,000 krill per cubic meter. These dense swarms elicit a feeding frenzy among fish, birds and mammal predators.

Shrimp Shrimp are native to many

of the world's oceans and lakes. They are generally found in shallow water. Their habitat includes both fresh and salt water. Although most shrimp are small, some can grow up to 9 inches in length. The shrimp has a very simple body consisting of the head and thorax, and a muscular abdomin for swimming. They have 8 pairs of legs, 5 for swimming and 3 for feeding.

Spider Crab Attack

Giant Crab Eating meet

Krill

Lobster