Well how about this instance that happened to james about 2 years back. While driftfishing for steelhead james gets a bite sets to hook and lands the steelhead. When it took the bait it went through the mouth, through the gills and then had it snagged in the side. So basically when it tried to swallow the bait it got filtered right out of it's gills.

Snagged or not is the question, keeper or not a keeper??
Keith