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.
Foods to feed your crayfish include leafy green vegetables such as Romaine lettuce (or other varieties); dried seaweed like Nori; sinking pellet foods such as shrimp or algae pellets; flake food; and freeze dried or frozen foods such as fish, krill, tubifex worms, bloodworms, squid, clam, etc.