New lionfish trap may help to keep numbers down – no diver needed


On my obsessive lionfish knowledge quest, I came across a new lion fish trap that is working in the Bahamas.  Frank Cooney Jr. from Bimini Sands Resort & Marina in the Bahamas has hosted two successful diving derbies targeting the voracious exotic predators, but they still appear on wrecks and reefs in alarming numbers, devouring their weight in native species.  He is experienced to say the least in dealing with this sea intruder.

He decided to try to develop a trap that would target the Indo-Pacific invaders specifically without harming native tropicals and other reef fish. With two engineer friends, Cooney came up with a prototype that has trapped as many as 37 lionfish in a deployment while sparing the natives. Now, his invention has drawn the attention of Vanessa McDonough, fisheries biologist at Biscayne National Park, who is looking for ways to knock down the population of the venomous, candy-striped exotics in park waters.

Cooney is expected to deliver one of his traps to McDonough and colleagues shortly for a possible scientific trial. Fish traps generally are illegal in Florida waters, but authorities may grant exemptions for research purposes.

McDonough said she would like to find out if Cooney’s trap is more successful and cost-efficient than using divers to spear lionfish. She also wants to make sure it doesn’t harm native species.

“We could determine how effective they are versus divers in the water, especially in light of sequestration,” McDonough said. “It costs money to put divers in the water every day.”

Cooney’s prototype is octagonal, roughly 4 feet tall and 3 feet wide and lined with lead weights on the bottom to ensure it sits upright in the sand. Made of net mesh and PVC pipes, it weighs no more than 20 pounds.

A clear plastic cylinder in the center of the trap holds small baitfish, which are made to look larger by a magnifying strip across the cylinder. This device is designed to lure lionfish into the trap through an entry passage made of wire material that is wide at the mouth, but narrows toward the inside.

Lionfish attack prey by first sucking in water and expelling it forcefully, creating a pressure wave aimed at stunning the smaller fish, which they then inhale. Cooney says once the lionfish fan out their pectoral fins for the kill, they get caught in the trap’s netting and can’t get out. Meanwhile, the decoy baitfish hover unharmed in the cylinder.

If scientific trials prove it effective, Cooney’s trap could help solve lionfish problems for the Florida Fish and Wildlife Conservation Commission and the Florida Keys National Marine Sanctuary.

What do you think?  I would love to know the costs associated with this trap and how long it would last?

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About daniellesdives

diving enthusiast
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2 Responses to New lionfish trap may help to keep numbers down – no diver needed

  1. Bryan says:

    If it works, it could be a savior of Gulf and Caribbean fisheries. Unchecked, the lion fish coupled with another natural catastrophe (BP oil spill) could jump start the next great extinction. The State Of Florida needs a solution.

  2. drummerben04 says:

    Hi Danielle, I presume that Lion Fish could be compared to House Sparrow which feeds on all native species lowering there population. Did you ever get to trying out the Maui SPF 30 Chemical-Free Sunscreen, how did it work?

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