Maddie wrote:Jools, I know that you can, but it shows 100 species max, and there are more than that.
Hi Maddie,
Yes, the list is very long. I would imagine, though, that a lot of these species rarely make it into the hobby, where an average person might be able to buy them at their local fish store (LFS). Given that, you could do use the Species search tool as Jools proposed, set the maximum size to 51 mm (or whatever your upper size limit would be), and then in the very bottom field where it asks you how you want the results sorted, you can select Order by "keepers" instead of order by "species." This way, the search would prioritize the results, pushing fish that are likely to be found in LFS into the top 100 places. For example, today I tried a species search, with maximum size = 51 mm and set the number of species to 100. Of these results, the bottom 20 are kept by only 2 or 3 members (based on the current registered keepers data). If only 2 or 3 people on this site have these fish, then these are probably pretty rare in the fish hobby.
I realize that this is not exactly what you are trying to do; but from your response to Jools, I interpreted it to mean that there is a super long list of small sized fish that people might want to keep in nano tanks, but the limit of 100 in the search meant that many good species choices weren't appearing because they weren't (alphabetically) in the top 100. Searching and ordering by "keepers" would help address this somewhat.
Cheers, Eric
I've noticed the lack of "different" suggestions for nano cats, so I made this list of 2" and under cats for those that want something outside the box! 
(and get you to 200 total spp)
