3 blue/green chromis will likely reduce to one or two
2 ocellaris clowns
1 lawnmower blenny
1 diamond watchman goby
1 dwarf flame angle not coral safe, especially for LPS meaty type corals
1 yellow tang
1 powder brown two tangs in a 125 can be problematic, yellow tang must be added last although it still may be a problem
1 green mandarin make sure you have sufficient live rock and the tank is at least 9 months old
These are my favorites. Would like to do as many as possible.
125g long.