So I've never kept angels before until about 2 mths ago....they had pretty tattered fins at the time, but now they have grown out pretty good. I was noticing today that they really stick close to each other and one i strongly feel is a female and the other a male...not totally sure, but via venting i've come to this conclusion. But i was wondering at what size do angels become sexually mature...mine are a bit larger than a half dollar probably 1.5-1.75" in body size, plus finnage.