Maybe some shrimp and/or snails. No fish that I am aware of.
I'm not aware of any fish that are okay in a 5g. Maybe someone will chime in. Corals and shrimp/snails would be fine.
Most shrimp are reef safe, from my experience I have had peppermint shrimp and a cleaner shrimp. Check out liveaquaria.com or reefs2go.com gives you a lot of info on all the different species.
Maybe a neon goby could fit? I have one in my 10 gal.
Maybe a neon goby could fit? I have one in my 10 gal.
I love yellow clown gobies and maybe a court jester goby? If anyone disagrees they can pipe in but I know clown gobies would do well in a small tank with corals