Sounds like you want the goby pistol shrimp pair so go with that. Do some research on which gobies will pair with shrimp, look up these fish and decide based on size, color, bahavior traits. This is a decision you'll have to make there is no "best fish to get"
Have you thought about sexy shrimp, these little guys will be perfect for a nano.
Have you thought about sexy shrimp, these little guys will be perfect for a nano.