This story is part of a series supported by Animal Charity Evaluators, which received a grant from EarthShare.

When I was a kid, my family would occasionally go fishing on small row boats on the lakes of Montgomery County, Maryland. The point wasn’t to catch fish to eat — we always released them — but rather to spend time together in nature. And for a while, I looked back on those times fondly. But as I’ve learned more about fish and their apparent capacity to feel pain, I now wonder: Was I just stabbing a bunch of fish in the mouth and throwing them back in the water, injured and vulnerable?

Ted Kerasote, a nature writer and lifelong hunter and angler, asked himself some version of this question decades ago after fighting to reel in a silver salmon in Alaska — the last he ever released. He still occasionally catches trout for dinner, but said that his decision to stop catch and release fishing that day in Alaska came down to looking at the situation critically: “Seeing this fish struggle for its life, for what end? I wasn’t going to eat it. Catch and release regulations were in place there. And so it was simply for my pleasure to fight this fish.”

Each year, tens of millions of people take to America’s lakes, rivers, streams, and coastal waters to catch billions of fish. Many of these fish only exist because US governmental agencies put them there; each year, over 1 billion fish are bred in hatcheries and stocked in water bodies primarily for anglers. And although firm estimates are hard to come by, it’s clear that the majority of fish caught are not kept for dinner, but tossed back in. Many fishing grounds actually require fish to be released (more on that later). 

While anglers report being primarily motivated to get on the water to commune with nature, spend time with friends and family, and relax, the whole endeavor is anything but pleasant for the fishes themselves. After the steel hook pierces their oral tissue — and sometimes their eyes, gills, or esophagus — they’re often yanked around to the point of exhaustion before being reeled in. Then they’re exposed to air while the hook is removed from their body (and sometimes also for a photo opportunity), before the angler puts them back into the water. There, the fish reenters an often-treacherous ecosystem while fatigued and injured. Sometimes, the hook can’t even be removed and likely remains in their mouths for hours or days.

Estimates on what percent of released fish die vary widely. One 2005 literature review landed the average at 18 percent, while a 2026 review put it at 11 percent. But these are by no means definitive, as they each pooled together data from dozens of studies with different methodologies and time observed after catch and release, which limits our understanding of fishes’ survival from these encounters. 

A different 2026 study, though also imperfect, took a more cleanly experimental approach. Researchers line-caught 489 Chinook salmon and then placed them in holding tanks for observation. Eight percent died within two hours of hooking, and about 25 percent died within 10 days. It’s reasonable to assume that the mortality rate would be higher if the fish were placed back into their local waters, with predators and other natural threats lurking.

Even when fish are caught by scientists like in this case, the operation is by no means surgical. In the Chinook study, 90 percent of the fish experienced moderate to severe fin damage, around 45 percent had moderate to severe hook wounds, and 8 percent suffered severe eye damage.

“No fish is better off because we’ve caught it,” Steven Cooke, a biologist and fisheries scientist at Carleton University in Canada — and an avid angler himself — told me. “It is impossible to catch a fish without causing, one, some level of injury, and two, physiological disturbance.” 

In other words, recreational catch and release fishing injures billions of animals (a vast number of whom were bred for this fate) and condemns many of them to a premature death, and likely a more unpleasant one than if they had simply been killed humanely immediately after catch. Which means that what is often portrayed as a peaceful — even benevolent — pastime is, in another light, a more torturous activity. Especially if you think fish might experience pain. 

What does a fish feel? 

For much of recent history, it’s been thought that fish — far from us on the evolutionary tree, living in ecosystems largely foreign to us — don’t feel pain. But in the early 2000s, a group of scientists in the United Kingdom began to conduct experiments on fish that slowly undermined this belief.

A seminal study, published in 2003, found that fish have nociceptors — sensory neurons that identify and respond to threatening stimuli, like predators or, well, metal hooks jabbed in their mouths. But it wasn’t necessarily evidence that fish feel pain in a similar sense to how we and other animals might; for that, a scientist would need to demonstrate that fish are not just reflexively reacting to noxious stimuli but also that their brains perceive it as pain.

Since then, researchers have poked and prodded fish to see if something more is going on than mere threat avoidance. They have, for example, injected acid and bee venom into the lips of rainbow trout, whose respiration rates nearly doubled and who proceeded to rub their lips against rocks or the tank walls — seemingly in an attempt to soothe the injury. 

In another experiment, scientists trained fish to feed in a certain part of their tank, and then subjected them to electric shocks in that area. The fish were less likely to seek out food as the shock intensity increased. 

But Cooke, the angler and fisheries scientist, isn’t convinced. He wants fellow anglers to treat fish better insofar as he wants fish to reproduce, grow, and have a good life, but says he’s a “fish pain skeptic.” 

“The evidence base around fish pain is meager and generally low quality, extremely biased, and unable to tell us whether or not fish have the capacity to feel pain or not,” Cooke told me. (Cooke, for his part, says he is biased too, and has received funding from pro-fishing interests.) 

The core of the skeptics’ argument boils down to the idea that fishes’ brains don’t possess the necessary equipment to experience pain — namely, the neocortex, which plays a major role in our and other mammals’ processing of pain.

Culum Brown, a professor and fish welfare researcher at Macquarie University in Australia, vehemently disagrees. “All [the information] we have to date suggests the behavioral, physiological, and psychological responses [in fish] mimic humans,” Brown told me. “Whatever way you look at it there are far more similarities than differences, which is not surprising given how important pain perception is from an evolutionary standpoint.” (Brown, I should note, has received some funding from animal welfare and ocean protection foundations.)

We know that various species of fish can use tools, recognize themselves in a mirror, build artistic nests, form complex social relationships, distinguish between human faces, and maintain long-term memories, among other abilities. Is it such a stretch, then, to extend them the capacity for pain?

Ultimately, as my colleague Marina Bolotnikova has written, the fish pain debate is partly a scientific one and partly a philosophical one. “The question remains unsettled because pain is a subjective feeling that science cannot prove definitively,” she wrote. One must be conscious to feel pain, and consciousness remains a mystery. With this uncertainty, we can continue to act as if they don’t feel pain, or we could give them the benefit of the doubt. 

Georgia Mason, a behavioral biologist at the University of Guelph in Canada, is, like Cooke, not quite convinced fish feel pain. But she argues that we ought to take a precautionary approach and act as if fish can experience pain until proven otherwise. 

With that in mind, should we be fishing for fun at all? 

Reducing harm in sportfishing — and rethinking it altogether

For his part, even as a fish pain skeptic and angler, Cooke is keen to reduce harm to fish. And the most important way to do that, he says, is to keep fish wet. He’s even on the board of a nonprofit called Keep Fish Wet.   

Why? “Most fish do not do well when exposed to air,” Cooke said. Their gills collapse and/or stick together, making it hard for them to get the oxygen they need.

“A fish should always be dripping wet,” and only out of the water for 10 seconds or less (the average time anglers kept fish in the air, in one study, was 29 seconds). The group Cooke works with also suggests anglers minimize handling time. And Cooke said fish will experience more stress if they’re caught in warm waters, as it holds less of the oxygen they need. 

Brown had a lot more to say. Anglers should avoid “playing” with the fish and bring them in as quickly as possible; use barbless hooks, which makes for an easier release; and when deepsea fishing, bring the fish up slowly to prevent barotrauma. And for those who kill, rather than release the fish they catch, do so quickly, rather than letting fish slowly suffocate or bleed out.

As Kerasote, the nature writer and hunter and angler, pointed out, catch and release as a widespread hobby is a relatively new phenomenon. Only in recent decades have state wildlife agencies made it a rule in many water bodies, in an effort to prevent fish depletion so as to ensure there is enough for wildlife to eat — and also so that there are always plenty of fish for anglers to catch. 

Before this, Kerasote said, “you went out there, you caught your limit and you were done.” But with catch and release, “there was no limit anymore, and that’s what became embedded in the fishing culture.”

To account for this shift, Kerasote wants to see states limit access to fishing in the same way that they hold lotteries to hunt certain mammals, like elk and Bighorn sheep.

Some fish scientists question the practice of catch and release altogether. While addressing an audience full of anglers at a conference, zoologist Eugene K. Balon bravely — or perhaps foolishly — shared a provocative thought experiment to prove his point. 

Imagine there is a recreational activity called “sportbirding,” Balon proposed, in which participants take fishing rods, put earthworms on the hooks, and cast them out into the forest. Then they wait until a bird — a Robin, in his example — falls for the bait and bites down on the hook.

“The shrieking and flopping bird is proudly wheeled toward the hide, the hook removed and the bird drowned in the water,” Balon said to the crowd (the water, in this case, is a parallel to fish exposed to air). “Would any one of you support such recreational activity? How does it differ from the sportfishing you support?”

“Sportbirding” would surely be considered barbaric to many — even many anglers, I imagine — and yet sportfishing enjoys widespread social acceptance, perhaps because of the persisting belief among many that fish don’t experience pain. 

Recreational fishing also has far-ranging impacts on species beyond its direct targets. For example, a study of over 2,500 pelicans taken into wildlife rehabilitation centers in Florida near the longest fishing pier in the world found that more than half of the birds had been injured by fishing hooks and lines — the leading cause of injury. Stocking nonnative fish to local water bodies can also upset natural food chains and ecosystems. And some of the live baitfish used by anglers spread disease to wild fish populations. 

There is also the issue of these “bait” animals themselves. Billions and billions of smaller fish — like minnows and shiners — are reared and sold each year in the US only to themselves be stabbed through with a fishing barb and intentionally kept alive and thrashing to entice a larger fish to chomp down on them. This is an additional, yet largely hidden, layer of suffering in the recreational fishing industry.

“I think fishing is worse than hunting,” Brown told me. “At least you know what you are targeting when hunting. And hunters pride themselves on a clean kill. It is a very different ethic,” than fishing, he said. That’s evident particularly in the world of competitive sportfishing, where marathon “fights” to reel in enormous fish are glorified.

For Cooke, many survey respondents, and even for me years ago, fishing is often about spending time with family outdoors, away from technology, while marveling at fish. But couldn’t that all be more or less achieved by taking a hike in the woods, snorkeling, boating, scuba diving, catching fish in nets, or even “hookless” fishing, which is practiced by a tiny contingent of anglers?

Not necessarily. Anglers, he said, are also motivated by the “thrill of the chase.” The uncertainty of what type of fish they will catch, and whether they catch any fish at all, keeps drawing anglers back to the water. Cooke said plenty of people who fish might also be driven by the “human domination of nature.”

Humans, like all creatures, are hardwired for survival. And for the vast majority of our history, that entailed catching and killing fish for sustenance. But now, most fishing is done for fun, or for those other pursuits: relaxation, thrills, the domination of nature. But the fun comes with an enormous moral cost that most anglers, it appears, would rather not confront. Because as our understanding of fish and their capacities evolves, our ideas about fishing might need to evolve, too.

Source: Vox.