Belize and Japanese secrets of blue water ocean fishing.

The secret of deep blue water ocean fishing.  The Japanese have a secret book, in which they give the depths different fish species favor like to live and cruise.  I've noticed it when I used to deep water snapper fish.  Outside the reef. Depending on whether you want black snapper, grey snapper, red snapper, you let your reel line out, weighted and stop it descending on the outside of the reefs, by a marked red tag on the line.  That is the depth and you will catch the kind of fish you especially want. Each fish specie likes a certain gradient of pressure and that is their territory.  Once you know that, fishing is much easier, especially if you are long lining for TUNA.  Even tuna have gradients they prefer depending on the type.