BONEFISH BREAKTHROUGH BY T. EDWARD NICKENS
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or hours, the researchers refused to take a drink of water or a bathroom break. On Bonefish & Tarpon Trust’s 23-foot Pathfinder, idling in the weak light of dawn above the offshore reef tract that parallels the Upper Florida Keys, BTT’s Florida Keys Initiative Manager Dr. Ross Boucek, BTT Research Biologist Natasha Viadero, and intern Parker Denton were glued to a sonar screen. The scan showed a glowing red blob under the boat—a school of bonefish that measured 20 feet from top to bottom. “We barely allowed ourselves to breathe,” says Boucek, recalling the intensity of the moment. The team had been following the massive school of pre-spawning bonefish for nearly 12 hours— from sunset the previous day to the yawning dawn of April 15, 2023—and exhaustion was gaining a stranglehold on the excitement of the moment. And summer was coming. This was very likely the last chance the scientists would have for at least
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six months to try to solve one of the most bewitching mysteries in marine fisheries: Where do the famed bonefish of the Florida Keys spawn? In an era in which scientists have plumbed nearly every corner of the globe, it seems oddly curious that the reproductive ecology of a fish worth millions of dollars to the economy of South Florida can seem as little-known as the dark side of the moon. Scientists do know that bonefish gather in giant pre-spawning aggregations (PSAs) as they migrate to spawning grounds. BTT researchers have recently identified seven such critical sites in the Bahamas, and one in Belize. But where the Florida Keys fish spawned was an unknown—and a critical piece of data for the conservation of the species. Now the giant aggregation of bonefish, a species far better known for its habit of feeding in inches-deep water than