Feeber (フィーバー Fībā) is a robot crab enemy in Mega Man V, found in Venus's stage and in the Wily Star. Feebers can be found around pits and spikes. It shoots bubbles as an attack, which can wrap Mega Man if he touches one. By themselves, the bubbles won't cause harm to Mega Man, but they will slowly carry him to the aforementioned lethal hazards. Mega Man can pop the bubbles by repeatedly attacking them.
There is one unique kind of Feeber found in the Wily Star that can shoot out bubbles that Mega Man can stand on, which is found in an alternate route using Deep Digger.