Oyster Day Minitheme

Oysters are those molluscs that live in the sea and that many people eat. Yes, as with many other living things, they have their own national day (at least in USA), which in this case is on August 5. We've created a minitheme about Oyster Day, so you can make the most of its 20 slides to talk about these molluscs and how they're viewed as a delicacy in many countries.