What are the CRs of the prehistoric, shark-blooded, and spined sahuagin mutants presented on page 85 of Raiders of the Fever Sea?
They seem like they must be tougher than average sahuagins, some moreso than others (the prehistoric one for example looks very tough, even compared to the other mutants) but I don't see listed CRs, which suggests that they're the same CR as normal sahuagins.
Can anyone clear this up?