There are two possibilities you could research. I can't tell by looking at the tail if it is forked or square, that would help with the ID.
Look under Assessor flavissimus , common names Gold Assessor,Yellow Assessor, Yellow Devilfish
also look underPseudochromis aureus , common names Yellow Pseudochromis, Yellow Dottyback, Golden Dottyback, Golden Basslet (which is interesting because it is not--would be more fitting for the Assessor)
I am not an expert, but just by looking at the depth of the body, my leaning is on the Assessor. I have a Neon Dottyback, and it is much more eel-like in its shape. On a personal note, I hope it is the Assessor as I think they less aggressive. I wouldn't get a Neon Dottyback again. It is one of the prettiest fish I've had but it will kill and eat shrimp, hermits, tries for the snails, and of course bristle worms, not to mention harrassing shy fish.
Good luck with your ID. BTW, what was the the fish labeled as at the LFS?