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Crabs, and the clawlike appendages are called chilipeds.
Mantis
Palps are a second pair of appendages found in crustacean and insects. These appendages are located near the mouth and are used to guide food into the mouth.
The two body sections of a typical crustacean the head and the abdomen, to which appendages are attached. By contrast, a typical insect has a head, thorax and an abdomen.
swimmerets
A squid has ten appendages. A squid's appendages are arranged in five pairs. The longest pair of appendages, the fourth pair, are called tentacles or feeder arms.
Crayfish are members of the crustacean family.
isopod
I
Appendages and lower extremities.
Yes. They are called fins.
The fiddler crab is both a crustacean (a subphylum, comprising usually marine arthropods) and an arthropod (a phylum characterized by segmented bodies, an exoskeleton made from chitin, and joint appendages.)