Arakis

Arakis, the Hive'Zora overlord, is a huge level 54-55 named brown/grey silithid worker found in Silithus. He is under the order of the Qiraji and receives their orders through Emissary Roman'khan at the Bones of Grakkarond.

It's summoned during the quest

Trivia
Arakis is quite possibly a reference to the desert planet Arrakis from Frank Herbert's Dune novels.