There are three genders of jellyfish
I had not heard that. What species of jellyfish would that be? I have read that some species of jellyfish are essentially hermaphodistic, that is, each individual has both sperm and egg producing organs. Also that the common “sea nettle” jellyfish of the Chesapeake Bay goes through two reproduction processes, the first (sexual process) producing a plant-like growth, and the second, an asexual process of the plant splitting off the free swimming medusa forms.
Which is all very interesting, but how is it relevant? Human beings are not jellyfish.
For humans, there are two genders. Anything else is an illness or abnormality. It’s not a spectrum.
There’s also a name for the 3rd gender for mankind.