Death Jelly is known to come in two varieties:
Green jelly is a highly corrosive substance. If caught inside the jelly, organic matter is slowly digested. Non-organic material is excreted, albeit a with a nice smear-free shine.
Pink jelly is mostly harmless and tastes of strawberry, a favourite at goblin birthday parties.
Goblin nursery rhyme
green jelly comes slithering by
kiss your hide goodbye.
pink jelly comes slithering by
tasty as man flesh pie.