|Body type||Humanoid, crustacean|
|Unusual features||Claws have eyes and tongues|
|First appearance||"Waste Land" (only appearance)|
When Rex first saw these creatures, he and Agent Six had gotten into a difficult confrontation with them. Rex and Six escaped with their lives, but were eventually surrounded by them once again. Fortunately, the EVOs were tamed by Serge, who could control them. They appeared to be very friendly. Rex brought back a baby Crustacean EVO as a souvenir for Holiday.
- 202. "Waste Land"
- In the Generator Rex series, Crustacean EVOs seem to be friendly. However, they appear to be enemies in the Generator Rex: Agent of Providence video game and are named EVO crab men.
- There are three variants in the game, the first a brown variant explained as being a version of EVO that evolved from land insects, the blue ones native to Aquania, and finally red elite versions that are stronger then regular EVO Crab men.