Sexing yasha gobies?

Anyone have experience with yasha gobies? I bought a pair last week. How can you tell if they are a pair? I see no physical difference between the two side from size. And they hang out together.


Males will have a black spot on their ventral fins.
 
Anyone have experience with yasha gobies? I bought a pair last week. How can you tell if they are a pair? I see no physical difference between the two side from size. And they hang out together.


Two females :)
 
Neat video of the gobies I took today after work. They are in QT right now. In the video they are eating baby brine shrimp.

 

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