I think if you are going to rate them, only say how well they school and the ease of keeping, and even the price of them. And probably don't use stars - just say for example - ease of keeping: moderate, schools losely, price: $7-$10. Don't rate apperance or shape because that is your opinion. Some people probably think these fish are very ugly. Personally I think they are very cool though I don't get the pirana thing; their heads look kind of like a pirana's head, but there isn't really much of a resemblance. They look more like silver dollars if I had to compare them with something. Otherwise, great article Try and improve it, then send it off to Caryl so it can go in the Aquarium World magazine