Got some emerald crabs from Coral Farm recently. In the past, I tried to get a mix of male & female in an effort for them to breed in the tank. That never happened. In any case, this is a male.
Restocked on salt
It appears I'm one of the very few reefers who remix the salt to ensure they are homogeneously mixed. This is to ensure maximum consistency of the entire bucket. Regardless whether its synthetic or evaporated salt, not all particles will be of the same size. And there is a natural tendency for large particles to be at the top. And small particles settling at the bottom of the bucket during transit vibration. This is fundamental physics - something called granular convection
( Wiki : https://en.wikipedia.org/wiki/Granular_convection)