Plasmodesmata-Plasmodesmata are small tubes that connect plant cells to each other, providing living bridges between cells. Plasma Membrane-All living cells have a plasma membrane that encloses their contents. In prokaryotes and plants, the membrane is the inner layer of protection surrounded by a rigid cell wall.
Great blue herons and other aquatic birds eat crayfish. This includes surface feeding birds such as gadfly petrels, frigatebirds, gulls and fulmars. Crayfish escape from their predators by using a tail flip response. This rapid flip of their tails allows them to speed through the water away from danger.
Crayfish are oviparous animals. After mating, the female keeps the eggs in the swimmerets near her tail, located under the abdomen. When the eggs hatch, the tiny baby crayfish stay on the mother's tail until they are big enough to swim independently. They eat tiny bits of food that are floating in the water.