While we were at our friends' cabin near Bremerton, we watched a trio digging for geoducks. For the uninitiated, a geoduck is a huge clam-like animal with a gargantuan siphon which can grow up to a meter long. Although they are ugly, they are very tasty. (If you like sushi, you may know them by their Japanese name - mirugai.) As a result, people are willing to work pretty hard to get them.
They bury themselves pretty deep in the sand with their siphon sticking out the ground a little to breathe. Once in a while, they squirt water out like this:
Once you spot this, you dig like crazy into the mucky sand. Once you get a few feet deep, you need to keep the sand from collapsing into the hole, so you use a big pipe (really a sheet of plastic or thin metal rolled into a tube. Then, you reach into the tube and keep digging (these guys were using a little bowl for the last bit of digging.)
Finally, you can pull the geoduck out of the dirt and claim your prize. This is apparently a pretty small geoduck.