Skip to Content

Divers, why do we still eat the fish we try so hard to protect?

Divers, why do we still eat the fish we try so hard to protect?

Do you eat seafood? If you do, are you aware of the impact of commercial fishing on our oceans?

Why as divers do we try so hard to protect fish, never touch them, never harm them, but happily have them killed and cooked for us to eat…?

At Girls that Scuba we are not all vegetarian or vegan (although many of us are). This article has been written by both those who eat seafood and those who don’t.

We hope that it is read with the understanding that we are not trying to influence the reader’s decision, but to open their mind to the sustainability questions that eating fish raises.

“Demand for seafood and advances in technology have led to fishing practices that are depleting fish and shellfish populations around the world. Fishers remove more than 77 billion kilograms (170 billion pounds) of wildlife from the sea each year. Scientists fear that continuing to fish at this rate may soon result in a collapse of the world’s fisheries.” – National Geographic

A scuba diver floats above a large school of red fish in the Maldives.
Diving with a school of fish in Maldives | Photo by Simon Lorenz

How can we eat fish and also believe it is wrong to kill them?

Dr Laura Walton from Fit to Dive explains: “We have physical needs, and we do need some source of protein and other nutrients to survive, but that doesn’t really answer the question for those of us who have the luxury of choosing what we eat.  So we need to consider things like beliefs and values.”

“Fish are food, fish are friends! We are always experiencing new things, so sometimes we receive information that does not match our existing beliefs… and that is really uncomfortable. So our brains work to get rid of it before we even get to feel uncomfortable.”

“The technical name for this is ‘cognitive dissonance’.  Our brain prefers to hold onto the original belief, and actively hunts around for more information that allows us to do that, even in the face of differing information.”

A piece of orange coloured salmon sushi is held up to the camera with metal chopsticks.
Do we eat fish because our brain doesn’t know how to stop a habit? And one that tastes so good? Or do we just not know the effects fishing is having?

Disconnect from protecting to killing

Girls that Scuba moderator Weeze Coulcher tells us her side. “I’ve been sat on many boats listening to complaints that there wasn’t much to see in the water, yet seeing those same people tucking into a seafood buffet on board. Talking, over lunch, about how disgraceful some divers are in their interactions with marine life, yet chowing down on those very creatures.”

“I know if I was a little fish or squid I’d prefer to be prodded with a finger than stabbed with a spear, or whisked to my death in a net. I also know which one has the greater negative impact on the ocean and marine eco systems.”

“As divers, we daydream, scrimp and save to get into the ocean as much as possible, so I feel confused, and saddened how in some aspects our community seems to be helping empty and destroy the very oceans and populations of creatures we love.”

Do we really know what “sustainable” means?

Some fish-eaters will say they only eat “sustainable fish,” but do we know what that really means? A definition of sustainable in relation to the environment is: “Capable of being continued with minimal longterm effect on the environment”

National Geographic told the world that Seafood may be gone by 2048. If we can already predict when something will run out, this is not sustainable. Species like jack mackerel – once thought as impossible to over fish – have only 10% of their population remaining.

So even when we know this, why do we continue to kill and eat fish the way we are?

Weeze Coulcher tells us more: “The fishing industry has done well in promoting sustainable fishing, but personally, I don’t believe it, not on a large enough scale for it to really matter. If I just think about it logically, and how many people eat fish, I know there’s no way supply created even closely equals the demand.”

“And do I really believe commercial fishing operations are being policed properly? Nope. Over 200 million sharks are killed each year for their meat and fins and I know that there aren’t large scale breeding shark nurseries. (An argument often used for eating livestock.)”

“The numbers are just falling drastically. All over the world there is less in the oceans than there was 10, 20, 30 years ago. Even at just age 36, I’ve seen huge changes in places I used to snorkel in, and now dive in. And almost everyone around me is tucking into seafood lunches, and eating seafood dinners.”

“There is no hidden link to me, it’s obvious. And I don’t understand why those who love these creatures, and wish there was more of them, eat them.”

Small, commercially-caught red fish lay with their mouths open.


The conversation surrounding sustainable fishing exploded into the mainstream in 2021 with the release of the Netflix documentary, Seaspiracy.

Seaspiracy’s simplified call to action of “everyone must stop eating fish” has been analysed and discussed by many ocean advocates and environmentalists looking at the issue through a more intersectional lens, including here on Girls that Scuba.

Check out the full article for important further reading on seafood in coastal communities, fisheries management, and the distinction between fishing and overfishing.


Killing fish to eat isn’t just causing harm to the fish – there are many, many other problems from the demand of fish for food. Have you ever heard of Aquaculture?

Angie from Feet Do Travel explains further. “As a diver, I have become aware of the need to protect our oceans and the marine life within it, and this is the reason I chose to stop eating fish two years ago.”

“There is obviously the issue of commercial fishing which destroys the ocean bed, our precious coral and I don’t even wish to discuss bycatch. So what about one man and his line, that’s sustainable right? Maybe so, but discarded fishing line is the cause of the majority of our micro-plastics in the ocean. We all know the world has a plastic problem, so I don’t wish to contribute to it by eating line-caught fish.”

“However there was one issue that turned me from someone who used to eat fish, to a vehement non-fish eater. Aquaculture, otherwise known as fish farming, or as I like to call it ‘battery fish’.”

Online article clipping showing aquaculture nets and a young man holding up a fish to the camera.

“I was stunned to hear that 50% of the fish eaten around the world comes from aquaculture. The reason? Because we have already over-fished our oceans by 50%, the only way we can continue with the supply and demand is to build fish farms. Salmon, cod, carp and trout are the some of the most common types of fish farms.”

“Fish are bred in huge tanks specifically for the fish industry. Thousands of fish live in a tank with no room to swim, they are just ‘living’ on top of one another, existing purely to be eaten. Like I said ‘battery fish’. As a diver, I like to see my fish swimming freely.”

“There are many problems with fish farming. They are carnivorous so only eat other fish, and studies have shown it takes over 5 pounds of wild fish to feed 1 pound of salmon – and the wild fish is caught by unsustainable methods.”

“Overcrowding of fish means more disease. Farmed fish have to be fed with chemicals and antibiotics to keep them healthy. Nutritional value of farmed fish is also diminished, because they do not have the same varied diet as they would in the wild. Aquaculture farms in the ocean also means fish that escape spread their diseases to wild marine life which is not good for the environment. I could go on!”

“Admittedly, on one hand fish farming is good for our oceans. It takes the strain off commercial fishing as it’s a viable, sustainable method of meeting the supply-demand. However, in my head, I just cannot get the image out of my head of ‘battery fish’, and all the negligible ‘health benefits’ from it.”

“If you are a scuba diver or free diver, I implore you, for the love of fish you see swimming freely, view them as friends not food. Our oceans will thank you for it.”

A scuba diver swims above a large school of yellow snapper whilst taking a picture of a manta ray swimming past

It’s not just targeted fishing that kills fish

Whilst most people in the Global North wouldn’t intentionally eat a dolphin or a turtle, the tuna sitting on their plate could be inadvertently causing those animals to die.

Countless species of sharks, whales, seabirds, seals, turtles and dolphins are depleting because of being caught unintentionally.

Let’s talk about BYCATCH

“Bycatch […] is a fish or other marine species that is caught unintentionally while catching certain target species and target sizes of fish, crabs etc. Bycatch is either of a different species, the wrong sex, or is undersized or juvenile individuals of the target species. The term ‘bycatch’ is also sometimes used for untargeted catch in other forms of animal harvesting or collecting.”

What happens to the animals caught in bycatch? They are thrown back into the ocean dead or about to die. That’s it. Caught by “mistake” then discarded. And this doesn’t just happen in the deep ocean. It happens getting your shrimp too. In some instances for every 1kg of shrimp trawled there is 20kg of bycatch!

A large trawling net on the side of a commercial fishing vessel which has caught a hammerhead shark and two dolphins

Bycatch can have a number of consequences on the health of the underwater environment.

Removal of essential predators: Sharks and tuna are susceptible to overfishing, and when they are removed from the areas they live in, this means that sea creatures further down the food chain are negatively impacted.

Poor coral reef health: With a larger amount of smaller marine creatures comes greater damage to coral reefs and other elements of the ocean’s ecosystem. Reefs are essential to ocean life, and once they are harmed, it is hard to repair the damage, if at all.

Plastic fishing nets: Discarded into the ocean where marine life gets entangled, injured and die. These nets comprise almost 50% of plastic pollution in the ocean.

Threat to local food sources: There are a number of communities around the world that rely on fish as their primary resource for food. The growth of overfishing has caused serious threat to these communities, which are often located in developing countries. Without the ability to catch their food, their populations are threatened.

How you can make a difference

Many divers may want to help, but might not be ready to completely remove fish from their diet. If you fall into that category, there are a number of commonly eaten fish which are critically endangered and which you should avoid eating:

Bluefin Tuna
Sturgeon (black caviar)
Sea bass
Atlantic salmon
Atlantic cod

The Marine Conservation Society publishes a Good Fish Guide which indicates the sustainability of individual species depending on the method used to catch them.

Ways to keep eating fish but to give stocks a fighting chance to recover:

  • Educate yourself on more sustainable fishing practices, such as opting for pole & line caught options vs commercially fished seafood.
  • Don’t be afraid when at a restaurant to ask where the fish is from and what fish it is – you should always know the source and the species and make sure you are not eating an endangered species. 
  • For UK readers, take a look at this list of supermarkets to see which ones sell endangered fish – and don’t buy your fish there.
  • Be informed – read and watch more and make your own decision in your own time.

Please share to raise awareness