I'd say Golden Shiner. Anyone using minnows for bait in the pond? Maybe it was in a load of FHM if they were stocked in the pond.

How old is the pond, and were any fish stocked in the past few years?

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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).