I've seen it on the Chehalis. Seems like right around tide change the would start going for it. One night my Bro and I were way up river in a little Jon boat. Dark as all get out and all of a sudden they started going. Big ones and little ones. Kinda scary in a small boat just praying one dosn't land in the middle of it. It would of folded that boat up like a folding chair.