Help needed, crab ID instar stages

[nicholasan]

Hello,

I am conducting research on megalopae (larval) stages and I have come across a few that I do not have a species for. Two of these may be the same species, as they looked similar but one is darker. The third is white with that distinct strip so I am thinking maybe a rock crab? I have a instar/ crablet picture of what I think is one attached aswell.

Evidently these are Atlantic species. If anyone knows anything about these instar crablet stages, please feel free to suggest anything.

Thank you

 

[CoralB]

The first two Looks like a pitho crab imo.

 

[majano lover]

dunno, but he's cute!