Crab ID Please

[maroonman]

I seen a few baby crabs on a sponge I bought , ( didn't put the sponge in the seahorse tank yet ) Still trying to catch these crabs.
But I would like to try and ID them. I caught a big one tonight . Here he is with a little guy right beside him.

 

[Sugar Magnolia]

Gorilla crab. It has to go. I can't make out the small one but judging by the pointy claws it has to go too.

 

[maroonman]

Thank you . .
Now comes the hard part. Catching them on a sponge..Not the easiest thing to do under water.

 

[Betta132]

I know sponges have to be kept underwater... How fragile is this one?
Maybe you could tip it upside down and shake... If you kept it in the tank, they might fall off.
The tiny one looks kind of like an acropora crab.

 

[Guygettnby]

the small one's claws almost look like that of a porcelain crab. cant be sure of that though. too small and not the greatest picture.

 

[Betta132]

Catch the tiny one and look at his claws. If the claws have a space in the middle even when closed and are rather flat, it's probably a porcelain crab. Watch it and see if it ever starts to fan little things out from its mouth, that means it's a porcelain and is totally harmless.
In fact... It seems to have its fans out. I'm pretty sure that little one is a porcelain crab, now that I've looked.