They typically sleep about 16-17 hours a day; that’s a lot!
Cnidarians were the first phylum that scientists saw tissue level organization in. Tissue level organization meaning cells all of one type start to function in a unified way.
H = Hydrogen if I am correct.
So, the answer is:
muonic helium, possessing an unpaired valence electron, can bond with other atoms, and behaves more like a hydrogen atom than an inert helium atom.