Katia has just left the relatively shallow waters of the continental shelf and is now passing over Hydrographers Canyon which drops from about 600 feet deep to well over 6,000 feet deep. This location is where the deep ocean lower nutrient “blue” water meets greenish higher nutrient water found along the continental shelf. This is a very productive area and is heavily fished for tuna (bluefin, bigeye and yellowfin), sharks and swordfish.
