Glenndale/Twin

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Once you see them side by side, they are easy to tell the difference. The main difference is GS have a large mouth that looks like a bass mouth. BG have a small mouth. GS also have the "Blue Lightning" stripes on there head that shows up quite well and their gill plate is actually black and most of the time has a slight yellow border, not blue like a BG. The tips of the fins on a GS are usually yellow. The GS will breed with a BG and then you get all sorts or combinations. GS are very aggressive compared to a BG. GS are considered an evasive species in a lot of places as they multiply quite fast, are very aggressive, eat just about anything including eggs and small fish.

Good luck with the record. That is the largest GS I have seen in Idaho.
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