Thanks Michael. I've looked at so many of these fish over the last few weeks and what makes it more tricky is that they vary so much, presumably as a result of selective breeding. I've seen malkes with much more elaborate / flowing dorsal fins, but as you say the longer body shape of mine and the more pointy face looks more male. If I compare with the normal german blue ram, the females are almost always more stubby. My difficulty is that I just can't find anywhere with a female. Lots of "tiddlers" than could be females, but equally, an immature male.