Scissortails are just one type of Rasbora. They do get up to 6 inches so they are not what you are looking for. I currently have five 2 inch Scissortails in my ten gallon. They are waiting for a new home. I had them in my 75 gallon but they were not doing well so I moved them to the 10 gallon. The fish in the pictures are very pretty. I wouldn't mind have about ten of my own!