Black Marlin - Indian Ocean Billfish - dive - t-shirt - The Black Marlin is one of the biggest species of ‘sports fish’ reaching lengths of up to 14 feet and weighing over 1000lbs, which makes it a popular fishing target. We prefer to see our marlin still swimming about freely and not fighting for life on the end of a line, they look so much more graceful under the water. The great fish swimming to the surface and herding the baitfish inspires this image. The best T-shirt image? Definitely, Original? Absolutely