The crustacean is not one organism. It is a subphylum of arthropods. It involves crabs, lobsters, shrimp, crayfish, krill and barnacles. They all use claws to catch food except krill, shrimp and barnacles. The others use the hairs on their legs to catch microorganisms like phytoplankton swimming around in the ocean and eat them.
A shark
Eating. The crustacean mandibles are for biting, cutting, and holding food; used along with the maxillae which also manipulate and taste food prior to ingestion.
lobster
lobster
lobster
How do animal use ultrasonic sounds to find their way or to catch food
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Their mouth
to catch their prey they use their claws, to eat they lap their food with their tounge.
well it depends on who "they" are, but usually people who catch their own food use fishing, hunting, and a variety of traps.
The penguin use it to catch its food
it uses its teeth and or horns to catch its food