The Waterfall Grendels are a genetic breed by Grendel Man. They are a friendly, longer-lived species of grendel, and prefer to live in cool, damp areas. Hot, dry areas will interfere with their immune system.
The Waterfall Grendels' home is the Silence Falls metaroom.
There have been three versions of the Waterfall Grendel:
Version 1 could remain underwater for five minutes before drowning.
Version 2 was amphibious.
Version 3 panic when they begin to drown.