Fish Recommendation

[mr_alberta]

Hey everyone,

I have a 37G cube (24½ x 18½ x 21 ½) with a pair of false percs and a yellow watchman goby. I would like to add another fish that is reef safe and that will hopefully live happily in the tank with the current inhabitants.

Any suggestions? Something that will make people go, "hey, what is that?!" would be good. I would prefer a fish that swims more than a perching style of fish (like Bicolor Blennies) or fish that just stay in one spot (like cardinals).

Any help would be appreciated. Thanks!