Western Caribbean chlorophyll chart
Satellite data from
Open water in the western Caribbean between Honduras and the Cayman Islands, with the Swan Islands in the southwest quarter of the chart and the south shore of Grand Cayman in the northeast corner. The Honduran coast, the Bay Islands and Belize sit just outside it.
How to read today’s Western Caribbean chart
Work the colour line. Green water is productive and blue water is clean; bait stacks on the seam between them, and gamefish hunt that seam. The contours above trace the productivity edges so the line is something you can put a waypoint on.
The highest-percentage water offshore is where a chlorophyll edge lines up with a temperature break. Check this against the Western Caribbean SST chart and start where they overlap.
Pair it with temperature
Chlorophyll shows you the food. Temperature shows you whether the conditions suit the fish you are after. See today’s Western Caribbean SST chart →
Frequently asked
How often does the Western Caribbean chlorophyll chart update?
The image is regenerated twice a day from the latest satellite chlorophyll data in the Catalysst app, rendered on a log scale and clipped to the coastline. The date shown is the date of the satellite data, which moves forward about once a day.
What area does the Western Caribbean chlorophyll chart cover?
From 16.7°N to 19.3°N and 85.0°W to 81.0°W. Ports and landmarks on it include the Swan Islands and Grand Cayman.
Do you fish the green water or the blue water?
Neither — you fish the edge between them. Bait gets pushed against the clean-water line and predators hunt that seam. The highest-percentage water is where a chlorophyll edge stacks on top of a temperature break.
Why does chlorophyll matter if I already have SST?
Temperature tells you where conditions suit the predator; chlorophyll tells you where the food is. A break with no bait on it is just a line in the water.
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