Of course, Aquaman can't beat a pathetic pair of bank robbers without the help of sea creatures:
The octopus used just two arms!! People have two arms!!
Really!! Try it yourself at home!! You can throw a simultaneous uppercut and roundhouse!!
What? Why don't human boxers do it, then...?
From Adventure Comics #245 (1958), as reprinted in World's Finest Comics #230 (1975)