Nino Ruins are filled with these swimming reaverbots, which come in a large and small variety. The small ones will not attack unless provoked. Because of the low hit points of these reaverbots, provoked usually means one of them is blown up, which results in all of the others rushing to avenge it. The large kind on the other hand, stay in smaller groups but are quick to attack. Swimming switftly through the water they can deliver a powerful blow, or they may also launch a torpedo from their mouths.

Amusingly enough, draining the water in the ruins will not make these reaverbots disappear (as it does the Mandomantal), but instead they will be flopping around just like any fish out of water.