a girl exclaims. “I think they’re just mesmerizing,” Jennie Janssen, the assistant curator who oversees the care of the aquarium’s jellyfish, tells me. “They don’t have a brain, ...

Mucus from jellyfish that sit upside-down on the seafloor has blobs lined with stinging cells The stinging cells are coated on tiny mobile blobs called cassiosomes within the mucus that “zoom ...