Yea, I took Marine biology, and so I was aware of this . I only took the INTRO course, yet it was so-o-o fascinating learning of the 5 Zones of the #OCEAN. 
Congrats on your Achievement - Wow, Mr. National Geographic Nature Photographer of the Year !
To READ on Wikipedia about the 5 Zones : >> https://en.wikipedia.org/wiki/Oceanic_zone
