Did you know oysters are tiny water treatment plants?🦪 In this footage provided by Oyster Heaven, we can see just how quickly a handful of native oysters can filter dirty water. Oysters are true heroes of our seas. As filter feeders, oysters eat by sucking in water. Their gills act as a sieve, trapping food particles and pumping out clean water. As they feed, they also remove impurities such as pollutants and excess nutrients. Every single oyster can filter up to 200 litres of water a day, impr