Mutant mantis shrimp

Mutant mantis shrimps were to be creatures found in Interplay's Fallout Online - also known as Project V13.

Background
The origin of these creatures is unknown but they have been able to survive the conditions left behind by the Great War.

Far larger than their pre-War counterparts they are able to survive in waterlogged, cavernous openings on the coast and are capable of throwing devastating punches at a sonic speed, enough to split hardened power armor.

Locations
The only known mutant mantis shrimp was encountered by Jenkins on a shattered rock beach somewhere in the vicinity of the Glow.

Appearances
A mutant mantis shrimp appears in the short story "On the Beach", published in The Armageddon Rag, Vol. 3 and were also going to appear in Fallout Online.