"Metasepia pfefferi, also known as Pfeffer's flamboyant cuttlefish, is a species of cuttlefish occurring in tropical Indo-Pacificwaters off northern Australia, southern New Guinea, as well as numerous islands of the Philippines, Indonesia and Malaysia. The flesh of this colorful cephalopod contains a unique poison, making it unsuitable for consumption.[1]..."
https://en.wikipedia.org/wiki/Metasepia_pfefferi
You may choose to hang it from its feeding tentacles as a pendant or not. That choice is yours. However, you cannot eat it, no matter how delicious it looks. Like the real thing, this is poisonous.