aquandrew
Aquarium Advice Addict
agreed, and scooter dragonets are far too active for such a small tank. i would just get a cleaner shrimp and focus the tank on coral. 3 gallons won't be enough to support any fish, long term. you might be able to get away with a very small goby, like this one.
http://www.liveaquaria.com/product/prod_display.cfm?c=15+31+2230&pcatid=2230
http://www.liveaquaria.com/product/prod_display.cfm?c=15+31+2230&pcatid=2230