Different systems to determine lethality class are used for immotile and motile lifeforms.
Immotiles[]
I- Harmless even if ingested
II- Harmless unless ingested
III- Harmless unless attacked
IV- Harmless unless contacted
V- Harmful to those unprotected within 1m
VI- Harmful to those within 3m
VII- To be avoided
Motiles[]
(assuming the subject investigating is a 1.75m tall, warm-blooded sapient)
I- Docile even if ripped apart
II- Harmless except due to actions beyond its control, such as stepping on others
III- Docile unless attacked
IV- Docile unless contacted
V- Aggressive if in a small space
VI- Aggressive to those within 1m
VII- Aggressive to those within 5m
VIII- Aggressive to all who are reachable
IX- To be kept further than 1km away
Examples[]
- Tigrid Hunter- motile VI
- Aragtora- motile VIII
- Montothere- motile II