What Kind Of Goby Is This?!

[sbacklund]

So I went to one of my local aquarium stores (Dolphin Pet Village in Campbell,Ca) They have a very unique selection of fish and are pretty picky about who they sell their fish to. And are supposedly very knowledgeable in the fish department. I wanted a Goby that would be ok in freshwater they pointed me to a "marble goby" which I had never heard of but I thought it was cute. I have had him/her since December 2010 and he/she is doing great very healthy and eats everything in sight. The thing is i googled "marble goby" and found nothing that resembled my fish. All the "marble gobies" I found were massive. I think mine may be a Sand Goby but if it is, it is a female because there is no black spot on the first dorsal fin. BUt im not positive... Does anyone have any idea what it could be?
Here is a link to the video i posted on youtube this site wouldnt let me post it here

My link

 

[TJimbson]

Pretty sure its a specise of Rhinogobius goby. Possibly a juvenile Round Goby. There are over 50 species in this of spectrum so best of luck! Nice fish.

 

[nmonks]

Perhaps an Awaous species of some sort. But there are 2000+ gobies, and lots are imported on an occasional basis, so don't have much of a presence in the aquarium literature. Your best bet is the Yahoo Goby Group, where goby scientists are usually on hand to help identify mystery gobies.

I will note here what Naomi Delventhal suggests you do with mystery gobies. She's the author of the chapter on gobies in my book as well as the person who runs the International Goby Society. In short, keep them in slightly brackish water, because that will help keep brackish water species happy without harming freshwater species. SG 1.003 is fine. Keep the tank not too warm because some gobies inhabit fast-flowing streams and dislike warm water, and also ensure there's plenty of oxygen as well. Feed omnivorously, understanding most gobies favour small invertebrates and algae as food. A soft, sandy substrate is a major plus as most gobies like to dig or sift the sand for food.

Cheers, Neale