What are some types of crustaceans?

* Barnacles: These small, sedentary crustaceans attach themselves to rocks, shells, and other hard surfaces. They have hard shells and a feathery feeding appendage called a cirripede.

* Copepods: These tiny crustaceans are found in all aquatic habitats. They are important grazers and play a key role in the food chain.

* Crabs: Crabs are decapods, meaning they have ten legs. They have a hard exoskeleton and a pair of large claws. Crabs are found in all aquatic habitats and some species can even live on land.

* Crayfish: Crayfish are freshwater decapods that resemble miniature lobsters. They have a long, segmented body and a pair of large claws. Crayfish are found in streams, rivers, and lakes.

* Krill: Krill are small, shrimp-like crustaceans that are found in the cold waters of the Arctic and Antarctic oceans. They are an important food source for whales, seals, and seabirds.

* Lobsters: Lobsters are large, decapod crustaceans that are found in all oceans. They have a long, segmented body and a pair of large claws. Lobsters are prized for their meat and are considered a delicacy.

* Shrimp: Shrimp are small, decapod crustaceans that are found in all aquatic habitats. They have a long, segmented body and a pair of small claws. Shrimp are an important food source for humans and are used in a variety of dishes.