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"In his house at R'lyeh, dead Cthulhu waits dreaming..." - English translation of Aklo verse

This article is written on a topic within the Greater Cthulhu Mythos based on information from works in the Mythos. By default, all information is to be assumed to derive from the Lovecraft Myth Cycle unless otherwise marked.

This article acts as a repository of monsters, and other assorted entities that may not warrant their own article, but are worth recording

In the Cthulhu Mythos, there are not only abominable creatures from outer space and beyond our universe. There are individuals, human and otherwise, that have been changed by their encounters with alien beings, mad scientists and other still more sinister forces.

Biological experiments fall under the specification of being the results of direct intervention by an agent or entity in the Cthulhu Mythos to alter the biological functioning of the created creature. They should be differentiated from hybrids and other inter-species breeding or incidental mutant creatures.

The following are creatures that can be identified as biological experiments:


"These, Gll’-Hthaa-Ynn explained, were what men called the y’m-bhi—organisms which had died, but which had been mechanically reanimated for industrial purposes by means of atomic energy and thought-power...
...Those which most repelled Zamacona were those whose mutilations were greatest; for some were wholly headless, while others had suffered singular and seemingly capricious subtractions, distortions, transpositions, and graftings in various places. The Spaniard could not account for this condition, but Gll’-Hthaa-Ynn made it clear that these were slaves who had been used for the amusement of the people in some of the vast arenas."
-H.P. Lovecraft & Zealia Bishop, "The Mound"