I actually have had a few at one point. They are amazing predator fish imo. They aren't all too aggressive with fish close to the same size as themselves but anything bite sized is as good as gone. I had 3 in a 60g, definitely recommend atleast a 100-150g if you want more the 1-2 adults, as they can reach upto 12-16in, with lots of rocks, plants and driftwood. They grow pretty fast in their first year, got mine at 3in and they grew to 7in in about 6 months. Also if your looking for one of the best predators to feed live food to, look no further then the yellow perch. They pretty much hunt like wolves, 1 hides behind something in the tank while the others chase the prey towards the ambush, once the prey reaches the perch in hiding it gets hit from all sides in a feeding frenzy. Never seen another freshwater fish hunt with such tactics before. Mine also got along great with my Bala shark I had at the time, it was roughly the same size and shape as them so it became another "perch" in their eyes. It even hunted with the perch just so it got some scales to snack on. They aren't very entertaining when it comes to pellets tho but they do hit them fast and hard so expect to get wet lol. Also a neat fact about perch is when they spawn they create "egg ribbons" like this here pic I got from Google shows. These ribbons also need something to anchor to such as rocks, plants or driftwood. They also do what you could call a "community spawn" where it's not a pair of fish that spawns but the entire school/shoal instead.
Btw the pic shows European redfin perch but it's pretty well the same for our yellow perch.
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