i like most little tetras but after keeping rummys for nearly 4 years i love the colours & i love the little characters they are.ours all have their own 'patch' in the tank which they defend vigorously all day chasing intruders ( fellow rummys) away from, until night & moonlights when they all gather agin together in a little gang! we have one we call cave rummy, his patch is one of the rock caves in our tank, we've even seen him try & scoot off a big 6 inch yoyo loach out of 'his' cave- hillarious!