Crayfish Behavior and Anatomy

The video explores crayfish, a type of crustacean with an external skeleton. It covers their anatomy, including the carapace, pincers, and antennae, and explains how these structures aid in movement, feeding, and defense. Crayfish are aquatic and use their jointed legs and tail for movement. They feed on dead plants and animals, using their antennae and pincers. For defense, crayfish rely on their hard shell and pincers, and they often hide during the day to avoid predators.

What group of animals do crayfish belong to?

• Mammals

• Reptiles

• Amphibians

• Crustaceans

Which part of the crayfish is known as the carapace?

• The tail

• The hard shell covering the body

• The antennae

• The pincers

How can you distinguish a male crayfish from a female?

• By the size of their pincers

• By the color of their shell

• By the length of their antennae

• By the presence of long swimmerets with white tips

How do crayfish move quickly in water?

• By using their legs to paddle

• By snapping their tail under their body

• By spinning in circles

• By flapping their antennae

What do crayfish primarily eat?

• Insects

• Algae

• Dead plants and animals

• Live fish

How do crayfish locate their food?

• By using their antennae to detect scents

• By sound

• By feeling vibrations in the water

• By sight

What is the primary function of crayfish pincers?

• Swimming

• Defense and food handling

• Communication

• Attracting mates

What feature of crayfish helps protect them from predators?

• Their loud noises

• Their hard shell with points and bristles

• Their ability to fly

• Their bright colors

Why are crayfish more active at night?

• To avoid the heat of the day

• To find more food

• To socialize with other crayfish

• To avoid predators

What behavior do crayfish exhibit when threatened?

• They play dead

• They change color

• They sing loudly

• They raise their pincers as a warning