The epipelagic zone (0m-200m) is the area where light penetrates the water and photosynthesis occurs. This is also known as the photic zone. Because this typically extends only a few hundred meters below the water, the deep sea, about 90% of the ocean volume, is in darkness.
https://en.wikipedia.org/wiki/Deep_sea_fish
There are plenty of great deep sea fishing charters on the islands (we were on the big island). We found our guide in a brochure at an information kiosk. There were even three day plus inter-island tours for the serious angler. It was a blast.
http://www.wisegeek.com/what-is-deep-sea-fishing.htm
The goal with deep sea fishing is to travel far enough away from land so that fishermen reach deeper parts of the ocean, giving them access to fish species which only live in the open ocean.
http://www.wisegeek.com/what-is-deep-sea-fishing.htm
Many crews have a great deal of experience, and they can help first-timers navigate the ins and outs of deep sea fishing, although they cannot assure fishermen of a catch. Sport fishing is usually regulated by law, as big game species take a long time to mature, and some are threatened by over fishing.
http://www.wisegeek.com/what-is-deep-sea-fishing.htm
Deep Sea Fishing Florida. Deep sea fishing is the widely considered to be the apex of modern fishing. Some of the most exciting, thrilling, and rewarding deep sea fishing spots in the world can be found in the great state of Florida. Finding a decent fishing charter company can be a task in itself.
http://www.deepseafishing.net/florida/
On the minus side: Many small boats have small built-in tanks and some provide space only for portables. On the plus side: Light boats with small outboards can go all day on amazingly little fuel.
http://www.sportfishingmag.com/boats/boating-skills/little-boats-big-sea
Big game fish like the open ocean because it provides them with lots of room and lots of prey, and some fishing grounds may be teeming with such fish, especially if they have been well-managed. Often, a deep sea fishing expedition will travel beyond the sight of land to reach prime fishing grounds.
http://www.wisegeek.com/what-is-deep-sea-fishing.htm
Deep-sea fish are fish that live in the darkness below the sunlit surface waters, that is below the epipelagic or photic zone of the sea. The lanternfish is, by far, the most common deep-sea fish. Other deep sea fish include the flashlight fish, cookiecutter shark, bristlemouths, anglerfish, and viperfish.
https://en.wikipedia.org/wiki/Deep_sea_fish
Some charters venture out into the ocean up to 10 miles, while others are willing to go 35 miles out and up. The distance you travel depends on what kind of fish you would like to catch and the capacity of your charter company. Deep sea fishing can be a dangerous affair.
http://www.deepseafishing.net/florida/
Both of which can be found off the coast of eastern Florida as well as in the Gulf of Mexico. Popular Florida Deep Sea Fishing Destinations: 1  Cape Canaveral, FL. 2  Clearwater, FL. 3  Destin, FL. 4  Fort Myers, FL. 5  Fort Walton, FL.
http://www.deepseafishing.net/florida/
what is considered deep sea fishing
The apex of modern fishing is considered deep sea fishing.