Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn (*),

Dear aquarium enthusiasts,

Have you acquired a Cthulhu tentacle on the black market?
Keeping it isn't difficult. It thrives best in cold, oxygen-poor water.
Feeding is also simple: a fresh Dark Elf every few weeks, and your tentacle
will give you a suitably wicked wave from the glass.

(*) Translated: In his house at R'lyeh dead Cthulhu waits dreaming