I went to Ocean Aquarium today to buy another Rasbora maculata to replace Muninn, who died during the heatwave. Huginn, the other tiny rasbora seems fine on his own, but I was disappointed to learn that Justin had just sold his last R. maculata yesterday.

So, he introduced me to a couple of ultra-tiny killifish. He called them Rocket Killifish, which I've seen refered to as Clown Killifish, Epiplatys annulatus, and banded panchax. Although they are one of the first killies identified, they are rare, like R. maculata.

You can view pics of them here, here, and here.