We live on the lake and last night about midnight I observed two boats working along the shoreline of West Lake Sammamish, about 1/2 mile north of Vasa Park. One boat looked more like a large platform, outfitted with spotlights around it. It had several people working on the deck of the boat as it nosed in to each spot along the lake, mostly on one side or another of docks. The boat nosed in close to shore in each location, and had a number of what looked like metallic attachments on the bow. They almost looked like they were lowered into the water to disturb the lake bottom or try and grab and hold something. Some of the guys on the boat were carrying nets. After less than a minute in each location they backed out and moved south along the lake to the next dock. The other boat stayed offshore but close to the docks and moved along with it. My guess is that this was tribal activity (Muckleshoots most likely?), and that they were either taking samples of something, or they were moving along the lake to destroy as many of the bass spawning beds as they could. Wish I had a video, but I was not able to shoot one before they moved on. Any thoughts?