Nctosa and Nctolhu are the twin daughters of Cthulhu, hence they are called the Twin spawn of Cthulhu. They are currently imprisoned in the Great Red Spot of the planet Jupiter. They both appear as colossal shelled beings, with eight segmented limbs, and six long arms ending with claws, vaguely resembling their half-sister, Cthylla.
Gallery[]
MrMeowser's drawing of Nctosa (left) and Nctolhu (right)