Hasami is giant red crab who is usually seen with a leer on his face. His appearance resembles that of a fiddler crab's, with his right claw being bigger than his left. He has a green patch of grass growing on top of his head.
Being a giant crab, Hasami is capable of moving great distances across the vast deserts of Arabasta at high speeds. He travels at even higher speeds when he sees a beautiful woman. Like the rest of his species, however, he cannot swim in or tolerate water. 
Hasami carried the others off to safety while Luffy fought Crocodile, but only got as far as the Sandora River. Despite being unused to water, he was able to get them halfway across the river before sinking when they used "ero power" (pervert power) after Nami revealed to him her dancer's outfit when it was learned that Hasami apparently likes dancing girls.