In my years of exploring the rift, I've come across several different species and conceptually unique entities...it's actually quite possible I stumbled across hyumons in a parallel form of existence. However nothing with the biological composition that you pertain. 
*Chuckles*
Hyumons are just one among a literally infinite number of entity types. So no, I don't know the details about hyumons in the way I don't know the unique details of a specific hydrogen molecule in all the ocean in the universe.