Think these Gobies are a Pair?

[ggrillo]

Got them a few hours ago from my LFS. There were several in the tanks, but these 2 seems to act differently so I thought there might be a chance they could pair up. Here's a video after adding them to my tank about 2 hours ago.
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What are your thoughts?

 

[MoonSkin]

I think they are. One seems to have a boxier build to it's head which leads me to think it's the female. Females tend to be larger and greyish as well as having a more rounded body. The males seem to stay smaller and keep their yellow color. That is if these are yellow watchman gobies...

 

[DustyReefer]

They both appear to be female yellow watchmans to me at least. I would just keep an eye on them for now. With a new environment and with time they could become aggressive towards one another.

 

[jechew2]

They both appear to be female yellow watchmans to me at least. I would just keep an eye on them for now. With a new environment and with time they could become aggressive towards one another.

I think I agree that they look to both be females. I have a pair of YWG's and their tails are very different. What I assume is the male (more outgoing) in my tank has a pointed, spade-like tail, while what I assume is the female (more reserved and periodically has an overly full belly probably filled with eggs - looks like my spawning female ocellaris) has a completely rounded tail like your new additions.

I bought mine separately though and I can't remember whether they had differently shaped tails when I bought them or whether one possibly became male? I don't know if they can change gender like clownfish.

I do know that the first one I bought was grey and only changed to yellow after I added the second one which was already yellow.

 

[ggrillo]

Thanks for the input. One definitely has a bigger / boxier head and is much darker in color with the other looks a little thinner and is brighter yellow.

The tank is 4feet long so even if they do become aggressive towards each other I think they should have enough room.

 

[ggrillo]

Well they've been in the tank for about 24 hours now and have dug a hole together under the toadstool. One has turned bright yellow and the other gotten a little darker with a black line on its cheek.

 

[flfireman1]

They look to be acting like male and female. I would think that by now they would be some disputes observed if not a pair. Just my .02 worth.

 

[jechew2]

If they're sharing the same burrow I don't think you'll have any problems and it's likely they are or will be a pair.