Currently in a clan or in your creatures without a clan, you can sort by species, rarity, and series. A further sorting option--
sort by visual (first, second, third, fourth, and fifth/zero or numbers above fifth, when available)--would be good when there's more than one visual for a series (which is almost always).
So instead of sorting to see all creatures of one species in a series, you could narrow it down to one specific creature.For example, I'm currently going through my Easter event creatures and sorting extras into my trade clan. I sort for "Lunaris--Quest--Easter 2017." This brings up all duplicates of three different visuals:
It might be easier to sort duplicates for trade if you could sort by visual (in this case, first, second, and third), in which case all duplicates of
only one of the above creatures would show up.
For example, "Lunaris--Quest--Easter 2017--Visual 1 (or 1/3)" would bring up all duplicates of this creature only:
This would make it easier for users to find a particular creature, instead of an entire series. It could also help users who organize their clans by visual.