Watchman Goby ID (YWG/Blue spot?)

[CMG]

So I bought a yellow watchman goby online and I’ve had it in my tank for about 2-3 weeks now. I had never seen a YWG in person.. until yesterday at an LFS. The goby I have is massive in comparison to all of the YWG’s I saw, but mine still seems like a juvenile as it’s dorsal fin doesn’t seem developed, but it’s definitely some type of prawn/watchman goby. I’m sure someone here will know.

 

[LaloJ]

A photo of the fish's side will help you a lot

 

[CMG]

A photo of the fish's side will help you a lot

Thanks, this is the only side profile view I have and it’s a screenshot of a video, I’ll try to get one later after work. It’s not gray and striped like the other YWG’s I’ve seen on here that turned gray. He/she is almost a pale yellow/gray with blue dots all over the body, no dots on dorsal fin

 

[Karen00]

I'm curious about this as well. I thought the YWGs got rather large so when I saw a bunch of tiny ones at one of the reef LFS I go to I asked if they were babies. The guy said "no" they're almost full grown. I would've put them at about 1" max. I have noticed online lately a bunch of different types with varying names related to watchman goby so I'm assuming there are many different types. Maybe even different types known as YWG? I'm also wondering if there is a difference in size between captive bred (which I think the LFS YWGs were vs wild caught.

 

[LaloJ]

So I found some photos of Cryptocentrus cinctus (YWG) with gray tones and blue spots, but I'm not sure why they have this tonality, I found an article in spanish about spawning where the adults are gray, then the fry take the yellow color in a few weeks, and the YWGs reach a maximum size of 4", you probably already have an adult specimen.

 

[CMG]

So I found some photos of Cryptocentrus cinctus (YWG) with gray tones and blue spots, but I'm not sure why they have this tonality, I found an article in spanish about spawning where the adults are gray, then the fry take the yellow color in a few weeks, and the YWGs reach a maximum size of 4", you probably already have an adult specimen.

I’m thinking you may be spot on now that I Google the scientific term I found this picture. Looks exactly like mine it’s just very yellow lol. Thank you!

 

[mrtallbear86]

Went to LFS few weeks back and they had a blue one with blue dots and they guy said it was a female yellow watchman. He said if you have a yellow you can try to get them to pair and then it’s double the fun!