Naumachy
Naumachy (na"mȧ*ky) , noun
[Latin naumachia, Greek naymachi`a; nay^s ship + ma`chh fight, battle, ma`chesqai to fight.]
1.
A naval battle; esp., a mock sea fight put on by the ancient Romans.
2.
(Rom. Antiquities) A show or spectacle representing a sea fight; also, a place for such exhibitions.