I would say about 5 inches maybe 6. I have 2 little ones they are very dark and I can’t find them lol probably in my driftwood. In a 75g for now, once my Wyckii gets bigger he will get a pond or bigger acrylic tank, not sure yet. I have a 200g DD he’s in right now with a clown knife. Hard to get good pics, ignore ugly tank I didn’t feel like scraping off silicone lol just. Temp