600 feet deep
Imagine floating in the middle of the ocean where the water is 600 feet deep with 100 foot visibility. If you looked down, this is what you would see- Your feet, maybe a fish or two (the white object in the middle is big fish about 100 feet down), the suns rays piercing though the water, and the green object on the top is a kayak. Everything is a bit distorted from the fisheye lens.
Its an eerie feeling to think whats living in the depths under you! Later that day in Hawaii a 13 foot tiger shark swam right by us. Luckily we were in the boat and not swimming around like I was here! A couple lines from Wikipedia about tiger sharks:
"It is notorious for attacks on swimmers, divers and surfers in Hawaii; and is often referred to as the "bane of Hawaiian surfers" and "the wastebasket of the sea".
The tiger shark is second only to the great white in number of recorded human fatalities  and is considered, along with the great white, bull shark and the oceanic whitetip shark to be one of the sharks most dangerous to humans."
Another fun image of my feet in Hawaii!