Mechanical Fish

These gigantic automated attack boats fire cannonballs at passing boats with reckless abandon. To achieve their speed, however, they have very light armor; a single cannon shot is enough to breach them.

—Official Strategy Guide, Rayman 3

Mechanical Fish are a type of offensive Hoodlum watercraft which appear in Rayman 3.

An official level description refers to them as ‘waves of weird watercraft that only the Hoodlums were insane enough to launch’. These submersible vehicles resemble large mechanical fish, and are mounted with cannons. Vast numbers of Mechanical Fish attack Rayman and Globox's ship as the heroes sail across the Looming Sea to the Summit Beyond the Clouds at a late point in Rayman 3. In order to combat the Mechanical Fish, Rayman must retaliate by firing the ship's cannons at them. A single cannonball is all that is required to despatch one Mechanical Fish. After Rayman and Globox arrive on dry land, the Mechanical Fish are not seen again.

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  Some Mechanical Fish in the Looming Sea.