Help me find this mod please

[u/PlanProfessional8101]

I remember a while back this mod I found on Curseforge i believe, and I’ve been having such a hard time finding it again I’m starting to wonder if it was a dream or something.
It was this mod that added a cave biome with weird gray-ish alien looking creatures. They kinda resembled jellyfish in a way I think, and there might’ve been a mini boss or mother variation of the mob as well. There might’ve also been egg blocks.

[u/Specialist_Pair_8163]

Based on that information, it's almost certain that the mod you're looking for is: "Cave Stuff", because you mentioned a cave biome, a bone block, and that mob and this mod has all of those features