Being eaten alive sucks but it’s certainly a living for these foes.
Boss Bass – Super Mario Bros 3
Appearing in World 3-3 and 3-8, Boss Bass isn’t content to wait in the water for Mario. Due to the shifting water levels, it’s more than capable of seeking out and disposing of our hero in one giant bite. Boss Bass dies easily enough with thrown blocks, fireballs, shells and so on. But running around with Fire Flower, only to be taken out in one single gulp is aggravating.