That should be fairly simple to script.

it would be funnier just have them use the same poseballs people use.

"My poseballs have been infested with jellyfish polyps!"

I think they should definitely seek out poseballs to latch onto, yes.

*mixes up a new batch of "Capt. Poultry's Healthful Poseball Detergent & Sanitizer"

Glyph Graves makes some great cool jellyfish by the way......