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.

 

WHAT’S USUALLY THE FIRST CLUE THAT SOMETHING IS OFF IN YOUR REEF?

  • A fish’s behavior or appetite changes

    Votes: 12 15.8%
  • A coral looks different or stops opening normally

    Votes: 46 60.5%
  • Water clarity or surface appearance changes

    Votes: 11 14.5%
  • Equipment sounds or flow seem different

    Votes: 8 10.5%
  • A test result catches my attention

    Votes: 16 21.1%
  • Algae or other growth starts changing

    Votes: 15 19.7%
  • I usually notice when the problem is already obvious

    Votes: 4 5.3%
  • It depends on what’s going on

    Votes: 16 21.1%
  • Other (Post in the comments)

    Votes: 1 1.3%
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