As a Fish-Man, he was born with the natural strength ten times that of an average human, and twice that underwater. The spikes on his body make it difficult for him to be harmed by unarmored melee attacks. He can inflate his body like a pufferfish, extending his spikes outwards in an attempt to stab the enemy. His powers and leadership skills apparently were enough for him to be the commander of the squadron.
He was present when Hody Jones and Vander Decken IX raided the palace and took over. When Hody went over to Gyoncorde Plaza, he was seen behind him on the sea animal. Harisenbon led the Sea Urchin Armor Spine Squad to attack Sanji with their spikes, but he simply jumped up and let the Fish-Men crash into each other.