naumachy

A naval combat; a sea-fight.

In Roman antiquity, a mock sea-fight in which the contestants were usually captives, or criminals condemned to death.

A place where such combats were exhibited, as an artificial pond or lake surrounded by stands or seats for spectators. In some circuses and amphitheaters the arena could be flooded and used for shows of this nature.

A naval battle; esp., a mock sea fight put on by the ancient Romans.

A show or spectacle representing a sea fight; also, a place for such exhibitions.

a naval spectacle; a mock sea battle put on by the ancient Romans