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Boaters.com Magazine — Fish Files

Floating Cities of the Sea — Working surface structure to find more fish

by Bob Newman

We had been trolling teasers for sailfish and marlin for almost seven hours with only two billfish showing up in the spread, and neither the sail nor the marlin showed much interest in what we had to offer. Now the cruel Central American sun was beating down on us with a vengeance. I reached into the cooler for another bottle of water.
"Dorado! Dorado!" the mate yelled. The captain turned the boat toward where the mate was pointing.

"Where are they?" I asked the captain.

"Over there," he nodded.

"He saw two of them jumping," he replied, his eyes scanning the surface of the tropical Pacific.

Then we saw it: a 2-foot log with a diameter of less than 10 inches floating on the surface. Slowly motoring up to the seemingly innocuous piece of surface structure, we peered into the water and saw them. "Them" were about 300 triggerfish. Then a flash of gold and green sped by, then another, and another; they had deeply forked tails and tapered bodies. They were dorado, also known as mahi mahi and dolphinfish. Swimming nearby were hundreds of skipjack tuna, yellowfin tuna, bonito, tripletail and assorted baitfish. And hanging almost motionless below the mob of fish was a big black marlin, 30 feet down and looking to weigh between 400 and 500 pounds.

This one little piece of wood had become a floating city of the sea. It looked as though every fish for 10 miles had gathered below and around that small chunk of tree.
Grabbing my St. Croix Tidemaster spinning rod, I sent a yellow bucktail jig on its way. It landed with a ploosh and quickly was attacked by a small female dorado of about 7 pounds, which I cranked back to the boat as fast as I could. I tightened the drag down and placed the rod in a rod holder, the dorado circling in the water 10 feet below.

This is an old trick; a hooked dorado left in the water near the boat acts like a magnet to other dorado, which swarm around the area looking for food and staying within casting range. Now the real fun would start. I picked up an Abel 8-weight fly rod and delivered a 2/0 chartreuse-and-white Clouser 60 feet, which was in the water no more than three seconds when another dorado hit, this one running about 8 pounds. As I fought the jumping, spinning fish, I kept looking into the water and seeing numerous gold-and-green flashes of like-sized dorado. A few minutes later, the dorado on ice, I was in the middle of a double haul when I saw a much larger gold-and-green flash hurtle by the boat, immediately followed by another.

I stopped the cast, reeled in, set the rod down and picked up a Fly Logic FLO+ 10-weight, which is a more powerful rod but one that casts like a 7-weight rod. I double hauled and sent the fly out in the general direction those two big flashes were headed.

The fly hit the water and vanished amid a tremendous boil. My rod bent wildly and line fled the Ross Gunnison reel like Iraqi soldiers from a Marine bayonet charge, which is to say the line was really moving out. Fifteen minutes later the big bull dolphin was at the transom after a glorious fight that involved many crazy jumps and several blistering runs. I was somewhat pleased. As I admired the beautiful dorado, I couldn't help but think of how that little ol' log was responsible for all this. I looked around; both the mate and captain were both tied into tuna. The surface was a frenzy of feeding fish. I had forgotten all about the broiling sun and the last seven hours. Two thoughts occurred to me then: I was glad that I had the more powerful rod and excellent reel along, and I was pleased for having written a good book all about structure ("Flyfishing Structure: The Flyfisher's Guide to Reading and Understanding the Water" -- yes, a blatant plug !) so that others could better understand how and why fish relate to any object in or on the water ("structure"), and how they can use that knowledge to catch more of them.




This all happened on a trip to Crocodile Bay Lodge on Costa Rica's Pacific coast. On another day while fishing inshore, the radio was buzzing with word of a boat finding a large section of bamboo 25 miles offshore. It was holding hundreds of dorado, and the anglers were having a grand time catching them one after the other. Tuna were there, too, and that night we had delicious, fresh-as-can-be sashimi with wasabi sauce. Later in the week I got into some fine snapper and roosterfish that were hanging around an awash rock. Some anglers were battling tripletail near a plastic jug they found floating, while others fought sailfish and marlin that were found cruising near a scum line containing palm fronds and coconuts. It is all structure.
The next time you are out on the water, any water, look for anything floating on the surface. Approach it slowly and have a look. What you find might just make your day.


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Crocodile Rock - Trophy Costa Rican Sailfish Tactics

Boaters.com: Raving Roosterfish in Costa Rica

Boaters.com Magazine: Dueling with Dorado

Boaters.com Magazine: Coo-Coo for Crevalle Jacks

Boaters.com Magazine: Working surface structure to find more fish

Sport Fishing Magazine: Costa Rica

Sport Fishing Magazine: Costa Rica Revisited

Sport Fishing Magazine: Outstanding Osa

Orvis Travel: Costa Rica's Crocodile Bay Lodge



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