Dating llama pistol
The carapace typically surrounds the gills, through which water is pumped by the action of the mouthparts.
The rostrum, eyes, whiskers and legs also issue from the carapace.
It may also stabilize the shrimp when it swims backward.
Two bulbous eyes on stalks sit either side of the rostrum.
They have pleopods, but they use them as an intromittent organ or to hold egg broods, and not for swimming.
Whereas shrimp and lobsters escape predators by lobstering, crabs cling to the seafloor and burrow into sediment.
The carapace of crabs are wide and flat, whereas the carapace of lobsters and shrimp are more cylindrical.
There are significant issues with excessive bycatch when shrimp are captured in the wild, and with pollution damage done to estuaries when they are used to support shrimp farming.
Many shrimp species are small as the term shrimp suggests, about 2 cm (0.79 in) long, but some shrimp exceed 25 cm (9.8 in).
They play important roles in the food chain and are an important food source for larger animals ranging from fish to whales.
The muscular tails of many shrimp are edible to humans, and they are widely caught and farmed for human consumption.