Image by: Caleb Ballard
External anatomy of a male (left) and a female (center) preserved crayfish. The sex of the crayfish on the right is uncertain. Many of the appendages are visible, including:
In male crayfish the two most anterior swimmerets are enlarged and hardened, which can be seen by comparing the male and female. The cephalothorax, covered by the carapace, and the telson (most posterior segment that includes the anus) are also visible.
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