Hi, I'm looking for Medaka, otherwise known as Japanese killifish in Singapore. Does anyone know of places which have them? How much do they cost?

This is the wikipedia article on them: http://en.wikipedia.org/wiki/Medaka

I heard that they are commonly sold in science kits and catalogues due to its hardiness and value to science, but not common in pet shops. Googling medaka gives me NUS and whatever, but no signs of pet shops.

It doesn't matter if they are coloured or not.