Well for fresh water I would have to say Koi then Tanganyika Cichlids
As for salt
1) Red Sea Sailfin Tang
2) Sixline Wrasse
3) Prawn gobies
4) percs / clowns in general
5) Swallow Tail angels / Bellus / wantanebe
6) Jawfish
7) Other tangs i.e. mimic / regal / orange shoulder / scopas / etc
8) Anthius
9) ?
10) ?
I have left #9 and 10 empty because I am sure i will end up going crazy about some fish later down the road
