not the ones I have. I got them at a fish auction about 6 weeks ago and I don't know anything about them. Neither does the internet. If you can find me some info on pelvicachromis sp. "blue fin" then please, educate me. I got 3 of them for $7 and I was told by another guy there that a breeding pair was worth ~$40 and they bred pretty easy so I was kind of excited. 6 weeks later and I'm just now starting to see them eat, they're boring as hell.Kribs can reach 3-4" actually.