Spree Expeditions M/V Spree SCUBA Diving Dry Tortugas / Vandenberg, Flower Garden Banks and USS Oriskany
...world class diving just beyond the end of the road!
May 26-June 1 2010 Riley's Hump Mutton Snapper Spawning Trip Report by Captain Frank
We departed the dock for Riley's on the 25th in the evening as usual. We arrived to find calm conditions, and the Gulf Stream running across the hump. Let me tell you a little about the Gulf Stream. The warm clear waters of the Caribbean drive northward through the straights of Yucatan between the Yucatan Peninsula and the western tip of Cuba. The water enters the Gulf of Mexico as the loop current, turns south, and skirts the Florida Keys and heads up the East coast of the United States to meet the Labrador current somewhere off North Carolina. The Gulf Stream runs at 3 to 4 knots off of the Keys. When we arrived at Riley's, the current was between 3 and 4.5 knots across the hump. Remember, all of that water that usually occupies the first 4,000 feet or so of water is pouring across the bank 85 feet deep.

We dropped our first set of fish traps, and they were swept away. We dropped them again, and they were swept away. We put some divers in, and they were swept away. We put some more in, and their floats were pulled under water and they were swept away. We scratched our heads.

On day 2, the current was a little stronger, if anything. We couldn't perform fish counts, so we decided to try to pick up the pinger tag receivers that are set out there. I had to learn to drop divers 150 yards up-current on a "hot drop" so they could find a receiver stand sticking 3 feet off the bottom in 15 feet of visibility. We dropped a lot of divers, but did eventually recover all of the receivers.
On day 3, the current held strong, and we did 3 mile drift dives. We'd put the divers in in the middle of the bank, and pick them up a mile or so down-current of the bank. It was getting a little silly. Since the divers couldn't carry a float, we gave them all of our technical SMB's so we could find them 3 miles away. Thankfully, there was very little wind, so the Spree drifted at the same speed as the divers.

Day 4 we decided to set the fish traps by hand. 2 divers would swim the traps into the designated trapping site. By swim, I mean hold onto the trap for dear life and try to guide it to a place with some known landmarks so it could be found again. We immediately started catching fish. The fish would have acoustic tags implanted in their bellies, so we could track them using the afore-mentioned receivers. By now, the visibility had cleared up to 100-200 feet, and you could actually see what was going on around you. The current was still howling, however.

We tagged a total of 11 fish, including 5 mutton snapper. The plan was for 20 muttons, but we spent the first half of the week trying to figure out how to work in the conditions we found. All of the acoustic receivers were recovered and re-deployed, and we saw thousands of muttons. We had reporters from the Miami Herald and Florida Sportsman magazine, when their articles come out, I'll forward them on.

We had a great trip and fun times, maybe the conditions will be a little better next year....
Capt Frank
M/V Spree
Stock Island, FL
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