Happy Earth Day! (Video from Dive 03 of the current expedition on NOAA Ship Okeanos Explorer. Observations made using the high-definition cameras and powerful lights of remotely operated vehicle Deep Discoverer, piloted by the team from Global Foundation for Ocean Exploration, can provide us with important insights into the ecology of the deep ocean. Produced by Olivia Andrus-Drennan, GFOE.) | NOAA Ocean Exploration

Experiencing remarkable scientific firsts in the depths of the ocean? That's just a normal day for the team of the OceanXplorer 🦈 #OceanXplorers is now streaming on Disney and Hulu. | National Geographic TV

how deep is the ocean The ocean is divided into several zones based on depth and temperature, including: Epipelagic zone The upper open ocean, from the surface to 650 feet deep. This is the zone humans know best because it's the easiest to reach. Mesopelagic zone Also known as the twilight zone or midwater zone, this zone extends from 650 to 3,300 feet deep. It contains the thermocline, where water temperature decreases rapidly with depth. Bathypelagic zone Also known as the midnight zone, this