the only type of trigger that would fit in a tank that small is an undilated.
Your tang will outgrow your tank
and do you expect to return the clown and damsel? or are you expecting them to be food?!!!! :scared:
A snowflake eel would fit
any of the sharp nosed puffers like a valentini or spotted
dwarf lions like a fuzzy, dwarf zebra, fu manchu, antenna
maybe a small scorpion fish? depends what kind.
an angler if you dont want any other fish in there.
any other types of fish you like?