What happened to all the Blue-lined gobies?

[smartwater101]

I remember, like 5 years ago, getting a Yellow-line goby was much harder and Blue-lined were easy to find. Now it seems to be the opposite.

Not a huge deal, of course, but I'm curious as to how/why that shifted.

 

[User1]

Last pair I bought was from Live Aquaria - ORA captive bred yellow and blue has a pair.