My roseline rasboras!!!! Which come from India, in the fast flowing streams, do well with very very small fish. I had a school of cardinal tetras and pygmy cories the whole time with them. I also had a male betta and gold nugget pleco with them. They like chewing on plant material and will eat a lot!! I had mine for 3 years and they grew to about 7" head to tail. They swim horizontally all the time and like to jump. I had one die from jumping into the glass top when it was spooked. I got rid of them because they would swim constantly side to side and it was very annoying!! They looked awesome though.