While there are more than 5 edible species we speak of THE 5 which are generally available in the US. One of those is Ostrea Lurida. This is the species that is native to the pacific coast of North America. It is also one of the species which comes in only one “variety”. That variety is known as Olympia and is farmed only in Washington State. Here’s a short video about how to shuck them. They’re very small. Mature Olympia oysters tend to be only a bit larger than a quarter. But they are delicious and a true “DelicaSEA”. Olympia Oysters were Mark Twain and James Beards favorite kind of oyster.