Yes, I agree, we could include this in the describtions, – however I think I would never say that one could really safely determine the sex of a paro seen in the shop before buying. I would never myself feel certain that I could see that, there are too many factors there that makes it uncertain – and a frightened paro is so difficult. Plus unknown age makes it difficult as well. So theres no safe way to aquire a ‘pair’ of paros, as you may find with other species. I have tried to say to my local fishshop 🙂 .. I would like to buy a pair of this paro… and they do know I am joking, because thats simply too difficult in most cases.
And I think we should also remember that this situation is an unusual one, – and not a general rule, – but it could of course be mentioned that it is a possibility, I think it should, – and I will certainly be aware of it in future advice.