I will try to do that during their next feeding session. I'm beginning to suspect that the the bigger one with the large toe tip is a Suriname Cobalt and the smaller one is actually a female of another cobalt variant.
This is the only information I had from the add placed on dendroboard:
Line/Origin – Male – Tropical Ecos, Female - Nabors
When I received them, there was a labeled written as "Suriname Cobalt"
Anyone have extensive experience with different variants of cobalts?