Avoid Phantom Fish Easily
If facing phantom fish, do not use the Vigoorian Flail, as Ayane advises. Instead, just equip the Dragon Sword or the Kitetsu. Then, when running, jump and press X. Keep jumping as you land and you will not be hurt and will actually kill a lot of the fish.
More tricks, tips and cheats for this game are right here - Ninja Gaiden: Black cheats
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