You may be familiar with oysters as the delicious seafood best eaten raw (or as ice cream) and served in months ending in “r,” but did you also know the little guys have impressive filtering skills that can clean even the dirtiest water?
Eating its fill of plankton and other particles floating around, a fully grown oyster can filter more than 50 gallons (189 liters) of seawater in one day. After seeing a few videos demonstrating this cleaning ability, some Japanese netizens started to question just how appetizing this made the once delicious-looking oyster.