The Tetra Ettins were created by Trix for the CCSF 2006. The breed is amphibious and can swim with Nornagon's Swimming Agent. The age of each ettin can be discerned by the size of their tail. They are a genetic breed, and use the sprites from Micro Ettins (Ettin B) and the Guppy Ettins (Ettin F). They are available for download at The Universe of Ettins.