One Piece - episode 40 - 05 Sep, 2000

With Hatchan defeated, two of the fishmen battle Sanji and Usopp. Things look grim for Sanji as he attempts to face Kuroobi underwater, and Usopp gets the chance to prove that he too is a brave warrior by facing Chew. (Source: Wikipedia) East Blue saga: Arlong Park arc: (10/14)