Board Thread:Oblivion/@comment-80.212.197.34-20130414172641/@comment-9581439-20130515112520

I'll say they have several tribes.

Bitterfish Tribe, Bloody Hand Tribe, Dust Eater Tribe, Rock Biter Tribe,

Sharp Tooth Tribe, Skull Breaker Tribe, Three Feather Tribe, White Skin Tribe

or if you want them by name here http://www.uesp.net/wiki/Oblivion:Bitterfish_Tribe#Bitterfish_Tribe