Fish ID (Acro Hitchhicker)

[mntl]

Tried this in the sps forum but might be more appropriate here:
I got a new mini colony yesterday and on the colony was a acro crab and deep in it was something dark that I could not make out. This morning I woke-up and in my sump was what looks like a brown 1/2-3/8" citron goby with a stripe through it's eye. It is definatley not yellow like a citron but same shape and now it is just sitting on the bottom of the sump, hopping around. I know i have seen these before but I cannot seem to find a pic at any of the sponsors sites. my question is:

Is this little guy a problem for the colony like citron gobies can be? Should I keep or remove him? If i get rid of him I will give him to a friend that has no acros, does he need acros to survive or will he do fine in a mixed reef? If he is bad I guess i am lucky that he got into my sump so he will be easy to catch (never would have happened if he was in the colony WAY to small).

For size reference he is sitting on the silicon in a 10gal tank.

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Thanks in advance!!! The ID is important but the questions regarding possible acro damage and habitat are more important to me.

--John

 

[Mike de Leon]

i have no idea wat that thing is! but its kinda cute! ive heard that they dont do well in tanks with fast swimming fish beacuse they dont end up getting there own share of food.

 

[Sports Girl]

Looks like a brown clown goby to me (Gobiodon sp.)

 

[RBTA]

A brown clown goby. Despite that people say that they are a parasite to SPS, if you read the ReefKeeping article on them(it actually says its a symbiotic relationship), they just use SPS as nests and to do that they remove a bit of the tissue but if you have good water quality they will be fine, I'll look for the article.

But they do not need acros they will do fine in a reef tank with any coral.
EDIT: Clown Gobies

 

[BTTRFLYGRL]

Its sooooo cute!!!:rollface:

 

[jmicky41]

If not a clown goby, maybe a coral croucher - Caracanthus unipinna?

 

[kevin21]

its either a black clown goby or a brown clown goby--there harmless, just like to perch on some corals. theyll never nip.

 

[nts9]

put him back

 

[Sports Girl]

I think if they spawn, the eggs laid will cause the tissue under them to recede but if the specimen is healthy should bounce back no problem.