More than 97% of all our planet's water is contained in the ocean, the top ten feet of the ocean hold as much heat as our entire atmosphere, more than 90% of this habitat exists in the deep sea known as the abyss, the average temperature of the oceans is 2ºC, about 39ºF, and The Great Barrier Reef, measuring 1,243 miles, is the largest living structure on Earth. It can be seen from the Moon.
