The Deep Sea fishing term would primarily give you the idea of ocean fishing activity, but this kind of activity prefer areas as larger or even larger than lakes whereas the level of the water is deep enough for big fishes to stay.
Rivers and ponds are not meant spots for this kind of fishing.
Deep sea fishing would require the use of boat, which should be big enough to load the fishermen, the equipments, and to add up the place they would need to store large fishes they would eventually catch.
They should prefer the type of boat intended to resist strong winds and bad weathers in the sea.
This would definitely help them transport and maneuver both the crew and their catches from the fishing spot to the sea coast safely.
The kind of fishes that qualifies in this category of fishing includes marlins, sailfish, swordfish, large tunas and different types of sharks.
In the process of catching such fishes, there are those small marine species that come along with them, some are accidentally and the others are intentionally to be baits for the bigger fishes.
This kind of fishing has been popularly known in some areas namely, California, Florida, north of New Zealand, in Nova Scotia, Hawaii and so on.
The advantage of deep sea fishing in such areas is that large fishes intend to stay and linger near the coast that is why it is easier for an individual to catch them.
From being a hobby, to an occupation and nowadays more likely as an entrepreneurial activity, it has evolved through time.
Different techniques have been known in this kind of fishing, one of which is trolling.
It is the step where in one draws a baited line through the water.
Examples of baits used are squids, worms and other smaller fish.
It is thrown in distance from behind the boat.
The people, who are responsible for spreading and enlarging the areas design for catching, commonly called the outriggers, are also the stabilizers behind the boat.
Another technique is the chumming or chunking, which requires the use of larger bait to be thrown over the board and most likely would attract larger fishes than the usual.
To sum it up, deep sea fishing has been establish out of necessity; the need of the public for larger fishes.
Presently, it has been popularize due to the high demand of large fishes in the kitchen.