Not really a question, more an observation, but if anyone has comments they would be appreciated.
I've got quite a lot of guppy fry at the moment. 4 are from an older batch and about 30 from a more recent batch.
The first 4 are approx. 4 months old, I haven't really been keeping track of their age, though I wish I had now.
At about 5 or 6 weeks old I had, or at least I thoguht I had one male and 3 females. The one male was developing bright colours and had a definite male anal fin. I left the male in my community tank and put the females into a 15g grow out tank to prevent inter-breeding. All was well. One of the females has developed slight colour and snakeskin pattern on the tail over the last week or so but it was very faint. Tonight I noticed he said female chasing anoher female around the tank a lot so I took a closer look - the female is definitely a male! When I started noticing the tail pattern I checked again for the male anal fin but it wasn't there so I thoguht nothing of it as many females do have coloured tails anyway. Only tonight has it been evident that the anal fin is male.
I was just wondering what you guys thoguht about this. Maybe it's nothing unusual, I don't know - this is my first batch of guppy fry. I just found it quite odd that there was such a space between the 2 males developing their male attributes. There is at least 3 months between one being apparently male and the other, though it might be more than 3 months, 3 months is just a very conservative approximation.