1) You have no use for the male double het.

2) The female het clown "may" be up to breeding size next year.

3) The female spider "is" up to breeding size now (I would assume you are already pairing her up).

4) The male lesser might be breedable now.

5) You'd be taking away 2 genes out of your collection that you will have to purchase again down the road if you want them back in.


This looks to me like it isn't even close to being an even swap. Breed your spider female and use her offspring to buy what you really want (which probably isn't another het clown female and double het male).