tank mate for a lionfish

[JaiWiz]

not sure if i have the room but just wondering if i could put a tank mate with my lionfish in a 30 gal. tank the lion is a antennata and i know its a small tank but would like to put a little more life in there ornamental shrimp are def outta the questions as are crabs just wondering what kind of fish or anything else i could throw in with my prized lion.