The bubbles were big enough to make ripples in the gentle waves. Another way to spell the name is Gweduc, which looks a lot more like the word sounds. A Geoduck is a type of clam. It is a bivalve, which means that it has two shells hinged together. But the body of the Geoduck is so big that it spills out from the shells in a long neck called a siphon.
Geoducks live in holes in the mud.
They dig down into the mud and stretch their long siphon back to the muddy ocean floor so they can breathe. And those are the bubbles you see. They are the carbon dioxide produced by the Geoduck's breathing. Geoducks can be enormous. Big Geoducks can weigh as much as 12 pounds.