π Oysters: Nature's Tiny Water Filters π
The European native oyster is a key species in British waters, functioning as an ecosystem engineer that cleans the environment. This bivalve mollusc can filter about 200 litres of seawater daily, improving water quality and removing excess nutrients. A female oyster of around 8cm can produce 1 million larvae, while larger ones can release up to 2 million in one event. Populations in the UK have declined by 95% since the mid-19th century, sparking restoration efforts. These oysters form complex biogenic reefs, providing habitat for countless marine life.