Tb saltwater crab id

[Ooh fiddlesticks]

I found this little girl in a shipment of rock I got today.
She’s tiny, at first I thought bad for sure but she’s carrying eggs so now I’m not sure.
She’s maybe 1cm, gray with black tipped claws.
Any ideas?
If they stay tiny and just scavenge they might be great, but I doubt it.

 

[Fish Fan]

Hmmmm, I'm not expert, but it's going to be very difficult to ID from those pics :)

However, "Chocolate dipped claws" is a halmark of gorilla crabs, which do hitchike on TBS rock, and can be a problem. If that's what you have, you may want to set a trap and try to remove them. They can live in your sump if you're so inclined to keep it, but they do get large.

 

[Fish Fan]

^Gorilla crab
https://tbsaltwater.com/blogs/reef-not-safe/hairy-gorilla-crab-pilumnus-sayi