Northwest Fishing Reports

I was fishing Lake Whatcom on Halloween and found something very interesting on my fishfinder. After posting on a Humminbird forum, thermocline and interference were ruled out but several people suggested it was baitfish.
I was under the impression the only baitfish we had in the area were peamouth and sculpin

Anybody know if we have "schooling baitfish" in the area?

I observed a huge school of small <6" perch that ran for nearly 50 yds on Lake Goodwin last week--it looked very similar on the graph. I know they were perch since I jigged up several of them just to figure out what they were!

Yeah, could be perch. I saw what appeared to be a body on the bottom on my side scan. Arms, legs, head. Shook me up for a second. Hit it with the Panoptix and watched it disolve into a school swimming away. Marked it and came back and it just showed a big school of fish... Bizarre.
I have seen them in a line, in a ball, one that looks like an atomic explosion I got a picture of. No telling what they will school like.

Interesting, thanks for your input. Perch never crossed my mind but yeah, it makes sense.