Identified fish fry found - ID help (suspected YWG)

[SFREEF3R]

Sadly found this baby caught in my MP10. I didn't realize anything in my tank was spawning!

In the tank I have a pair of yellow watchman gobies, a pair of oscellaris clowns, a pair of yellow assessors, and a pair of Ignitus anthias.
Based on the few images I was able to find online I suspect the YWG, but would love to get a second opinion

On a related note - my YWG pair and their shrimp are typically out in my tank front and center all the time. I just got back from a 2 week business trip and they appear to be in hiding or have moved their entrance somewhere I haven't found it yet. Not sure if this behavior would help support the hypothesis they have recently spawned.

This fish (or what I think is a fish) is 13mm long by 3mm wide (roughly 1/2" x 1/8"):

 

[Sophie"s mom]

Wow! Very sad, but also very cool! Maybe @ISpeakForTheSeas can help here!

 

[SFREEF3R]

Bumping - also title should be "Unidentified Fish Fry found" oops

 

[ISpeakForTheSeas]

Wow! Very sad, but also very cool! Maybe @ISpeakForTheSeas can help here!

I can confirm it's not a clownfish larva, and it doesn't look like lyretail anthias larvae either (which I would assume look similar to ignitus anthias larvae); I would guess Yellow Watchman Goby larva, but I can't rule out the assessors here.

For pics to compare with (as well as info on them/raising the young); size and color-wise, if this is a yellow watchman larva, I would expect it to be around a month old, but at 13 mm would be pretty large for its age:

https://reefkeeping.com/issues/2005-12/ft/index.php

https://aquaticnotes.com/content/pub/EN/cryptocentrus.pdf

 

[DaJMasta]

Did you get your live rock from the ocean?

I'd suspect hitchhiker over fry, since the larvae start so much smaller than that and would take weeks to get to that size (find appropriate food, not getting caught in pumps, not getting eaten by other fish, etc.), which I think is very unlikely.

 

[SFREEF3R]

Did you get your live rock from the ocean?

I'd suspect hitchhiker over fry, since the larvae start so much smaller than that and would take weeks to get to that size (find appropriate food, not getting caught in pumps, not getting eaten by other fish, etc.), which I think is very unlikely.

Yes. But more than 4 years ago. I would be very surprised if I had missed a fish (even a small one) all this time given the amount of time I spend looking at the tank...Also seems quite small for a >4 year old fish