There are some cool shrimp out there, like harlequin shrimp. Do u have lots of LR? Cuz the shrimp would need room to hide, and yer scooter blenny needs to feed primarily on microfauna from the LR. Why dont u dump the damsel and get another percula, like a mated pair. Thats always cool. Do u have strong lights too? The anemone needs that. I cant think of any other inverts, sorry.