at 8cm you can prob tell the sex of it if you have the fish in front of you in your hand and you can look at it from all different angles.... but from photo at only 8cm im trying to pick out specific traits.... front ray on pec fins is very thick for its size indicating male to me... fish is quite lean indicating its not fed well or its possible a male... females tend to be fatter round the mid drift than males - much like humans on average... :thumbup: