What is the body condition of the larger LMB? Are they fat looking with small heads? Equally porportioned? (head/body)

Length only tells you that there was enough food for them to get to that length. It's the length/weight combination of information that tells the whole tale.

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3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).