It also happens to be a non-venomous jellyfish with no stinging cells on its tentacles. This means that if you brush one while you're snorkeling, scuba diving, or swimming, no harm will come to you.

Jellyfish have radial symmetry, meaning that if you sliced a jellyfish down the middle, the parts would be symmetrical, like the segments of an orange. These cnidarians are famous for their stinging ...

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 ...