Okay so Im sitting there watching my cons right, when I see they start doing funny things...e.g tail wacking, gill flaring... I knew straight away this was mating behaviour, but then, almost INSTANTANEOUSLY the females black stripes went pitch black, and all her other colours came out amazingly! As did the male go a deep shade of blue/black. Was amazing to watch! I thought that the colours would change slowly? Man that was cool!