Which specimen that we have dissected so far seems most like humans? Why?

The specimen that we have dissected so far that seems most like humans is the crayfish. A crayfish has antenna and antennules that is like humans' hair. A crayfish has walking legs like humans' but the crayfish has more legs than human. The crayfish swimmerets, sternum, uropod, and telson are like humans' feet and arms because humans uses their feet and arms to swim in water. The most obvious thing that a crayfish has that is like the human are the mouth and eyes. The crayfish abdomen are like humans' body or legs.