I keep a female green myself, currently in a 30L (36x12x16) with 3 creek chubs that are bigger than her, she'll soon be upgraded to a tank that's 125-240 gallons. She's about 4" now hopefully going to get 6-8", unstunted males can get 6-12" but sadly Southwest PA has a lot if stunted sunfish populations. Males are much, much more aggressive and can be terrors to the point of not tolerating tankmates whereas females are still aggressive, but will almost always live fine with tankmates.
How do you tell the difference between male and female? I have a pond on my farm with a breeding stock of bluegill and bass and can tell the difference between male and female bluegill. Is it similar? I'm not sure if I said the fish is about 5-6". Would that be a large enough size to tell?
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