From Warhammer 40k - Lexicanum
Sumpkrocs are a type of reptile on the Hive World of Necromunda.
Sumpkrocs are large reptiles that have become grotesquely oversized and mutated. Extremely aggressive, they are sometimes utilized by Hive Gangs such as House Goliath. However while ferocious they are not especially intelligent, easily being distracted by its own reflection.
- 1: Warhammer Community
- 2: Liber Xenologis, pg.102