Nicknamed “grey ghosts” for their lustrous silver scales, remarkable stealth and speed, bonefish can swim at up to 40mph. This species, protected by catch-and-release laws in the US, is revered by anglers around the world, many of whom visit Florida to seek the elusive fish.

But evidence points to a steep drop in bonefish numbers in south Florida. Populations have fallen more than 50% over four decades, according to estimates by researchers.

Dr Jennifer Rehage, a fish ecologist and associate professor at Florida International University (FIU), has spoken to many anglers about the fish’s disappearance from Florida’s seagrass flats: “They’ve said to me: ‘I’ve fished [bonefish] all my life and I can’t find them. I haven’t seen a bonefish in five years, and it’s freaking me out’.”

Read more at The Guardian