Every fish has spikes, almost. BG, SMB, YP, LMB, Walleye, etc.
Conventional wisdom says Yellow Perch are a better forage fish for SMB than Bluegill.
I just put (130) YP in the 4" range into this new 1/5 - 1/6 acre pond.
Excerpt from Robert Crais' "The Monkey's Raincoat:" "She took another microscopic bite of her sandwich, then pushed it away. Maybe she absorbed nutrients from her surroundings."