What a great thread! Normally a lurker, but this one needed a post LOL!
It would be IMO imposable to single out one species as a favourite, so have narrowed it down to three instead.
First it must be the Zebra Danio
They were the first fish I kept as a child and have ensnared the next generation as my son is now addicted :p
Simply for the amount of joy they have given novice ad experienced fish keepers alike they should make any top 10 list, but they have also given so much to us in the for of medical research.
They are a truly amazing if all too often overlooked little fish. Diamond Tetra
is another firm favourite, they may out stand out in a shop tank surrounded by fish who look ready for carnival, but given the right conditions and time to mature are a stunning,very active fish that is a joy to watch.
From the salty side,more my husbands arena then mine, I adore the Royal Gramma.
I was very much against the idea of a marine tank untill I spotted this fish.
It's a lot of money for little extra gain I said, then WOW, this one caught my eye.
Needles t say, the marine tank is on it's way, but now it is with my blessing :p