You are bidding on a group of Orochi Black Medaka Ricefish. 

These fish are very easy to care for, they are a small coldwater fish that does well in small pond settings. They can be outside in temps from just above freezing to around 90 degrees (in the shade), but will produce best in temps between 60 to 70 degrees. 

I left a pair of ricefish outside and while they may predate on their own eggs, these fish produced a large group of offspring in the outdoor tub.