A distinct form of Anery, usually of Nicaraguan origin. 
Tom Burke and Vin Russo have shown through breeding trials that it is indeed a distinct mutation and not compatible with Type 1. That said, there are Type 1 Nicaraguans. 
Anerythrism is an recessive mutation which results in the absence of the red pigment erythrin. As a result, these boas are grey, white, silver, and black. 
Incorrectly, many assume all CA Anerys are Type II.