Nice little tank. It's probably gonna get filled up with zoas pretty quickly, should look neat.
A clown goby would probably do okay. So would a trimma goby. Make sure you have a tight-fitting lid, all fish (except seahorses) can jump. And you might add a couple more large shells, tilted so the entrance is up, as additional hiding places, since your rock is all slabs instead of porous and full of hidey-holes. Looks like whoever pulled the rock out of the ocean was collecting somewhere with regular from-the-dirt rocks instead of coral rocks.
Keep an eye on the amphipods, if you don't get a fish. Amphipods left without predators can multiply excessively and bother your corals.
A clown goby would probably do okay. So would a trimma goby. Make sure you have a tight-fitting lid, all fish (except seahorses) can jump. And you might add a couple more large shells, tilted so the entrance is up, as additional hiding places, since your rock is all slabs instead of porous and full of hidey-holes. Looks like whoever pulled the rock out of the ocean was collecting somewhere with regular from-the-dirt rocks instead of coral rocks.
Keep an eye on the amphipods, if you don't get a fish. Amphipods left without predators can multiply excessively and bother your corals.