The scientific designation for the Mecrim was:
- Order: Reptiloprimate
- Family: Astridae
- Genus and species: Singropoda mecrimus
The Mecrim tracked their victims by heat, and perceived their own species heat patterns as friendly. They had some hearing and couldn't quite reach things on their back.
They were 1.6 metres to the shoulder, weighed up to 150kg, and had no external gender differences.
They reached sexual maturity in two to five years, had a six month gestation period, and had one to two young at a time. Their lifespan was about twenty years.