Tom Rowland Podcast Episode 795 is a conversation with Captain Nick Castillo about a startling discovery — pharmaceuticals turning up in the bonefish of the Florida Keys — and what that contamination tells us about the health of the flats and the ocean that anglers depend on.
Listen now: Apple Podcasts · Spotify · YouTube · or press play in the player above to watch.
Captain Nick Castillo is a Florida Keys flats guide and conservation advocate who has been closely involved with research into the health of bonefish and the flats fishery. He brings both on-the-water experience and a conservation perspective to the question of what is happening to the Keys ecosystem.
Researchers documented pharmaceuticals in the bodies of bonefish in the Florida Keys — human drugs entering the marine food chain and showing up in a flagship gamefish. In the episode, Nick Castillo explains what was found, how the contamination likely happens, and why it alarmed the guiding community.
Pharmaceuticals in bonefish signal that human waste and contaminants are reaching the flats and affecting fish behavior and health. Nick Castillo explains that bonefish are an indicator species, so contamination in them points to broader water quality problems threatening the entire Keys fishery.
Nick Castillo points to improving water treatment and infrastructure, supporting conservation research, and raising angler awareness as key steps. He argues that guides and recreational anglers have a direct stake in pushing for cleaner water and protecting the flats they fish.
Bonefish are a cornerstone of the Keys flats economy and an iconic gamefish. Their decline or contamination is an early warning for the health of the whole system, which is why Nick Castillo treats their condition as a measure of the fishery's future.
Tom Rowland Podcast Episode 795 with Captain Nick Castillo is available on Apple Podcasts, Spotify, YouTube, and iHeartRadio. The video version is embedded at the top of this page.
When I first heard that researchers were finding pharmaceuticals inside bonefish in the Keys, it stopped me. Nick Castillo has been close to that research and lives the issue every day as a guide, so I wanted him to walk through what it actually means for the water we all fish.
Press play in the player at the top of this page to hear the full conversation in his own words.
Nick explains the path contaminants take to get from people to the flats and into a fish that lives on clean, shallow water. The mechanism is more direct than I expected, and the way he describes it makes the problem feel a lot closer to home. Listen to that section early in the episode.
Bonefish are sensitive and iconic, and Nick frames them as an indicator for the whole Keys system. He gets into what their condition tells us before other species start to show stress. Worth hearing in his own words.
This is the part I pushed him on — beyond awareness, what moves the needle. Nick talks about water infrastructure, supporting research, and the leverage the angling community actually has. Press play in the player above for the full breakdown.
Nick connects the bonefish findings to the larger trajectory of water quality in the Keys and why he is sounding the alarm now. Listen to that part of the conversation.
Listen to the full conversation: Apple Podcasts · Spotify · or watch in the player at the top of this page.
What stays with me after talking to Nick is that the bonefish are telling us something we cannot afford to ignore. A fish that demands clean water is showing us the water is not clean, and that is a problem for everyone who loves the flats.
If you fish the Keys — or care about ocean health anywhere — this conversation is worth your full attention.
Press play in the player above, or grab Episode 795 on Apple Podcasts or Spotify.
The Tom Rowland Podcast brings you long-form conversations with the most accomplished anglers, hunters, conservationists, and outdoor professionals in the game. Listen to every full-length Tom Rowland Podcast interview.
Capt. Nick Castillo · Florida Keys · Bonefish & Tarpon Trust · Tom Rowland Podcast
Captain Nick Castillo is a Florida Keys flats guide and conservation advocate involved in research and awareness around the health of bonefish and the flats fishery. He combines hands-on guiding experience with a strong conservation voice, and he has become a leading advocate for protecting water quality and ocean health in the Keys.
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