🙂 Thanks, Peter. I will be trying to breed them! OK, so if he could be p.spec blue line, with the strong red markings (at about 2 cm long), then what could my old male be? He has very rarely ever shown any colours other than blue. He’s fully grown at about 3-3.5cm long and even when he displayed for his mate he used to look pretty much the same as usual, just a little bit darker. He seems to have little white ‘tear drops’ in his caudal fin, rather than a strong line. He is the one I am trying to find a mate for, so I want to try to keep to the same sub-species.