Whether you’re twirling shrimp pasta, savoring a buttery lobster, or plating a flaky salmon fillet, seafood rules the global menu. In many coastal nations, fish isn’t just a side dish—it’s a staple that feeds millions where farmland is scarce. Yet, even with its worldwide popularity, a bundle of myths and little‑known truths still swirl around our favorite ocean fare. Below are ten eye‑opening seafood facts that will make you look at your next bite a little differently.

10 Lobsters And Crabs Do Feel Pain

Animal‑rights advocates have long shouted that boiling a live lobster is a cruel act, likening it to torture. Defenders of the practice have countered with the claim that crustaceans lack the capacity to actually feel pain, treating the boiling process as merely a quick, painless death.

Recent scientific work, however, is turning that defense on its head. Researchers now argue that crustaceans possess sophisticated nociceptive systems—sensory pathways that can signal harmful stimuli and may indeed generate a pain response.

In a groundbreaking study, Robert Elwood and his team at Queens University Belfast exposed prawns to acetic acid and shocked crabs with mild electric currents. The animals consistently focused on the affected area, showed protective behaviors, and even responded to anesthetic treatment. These findings suggest a complex pain experience that should give any chef a pause before dunking a living creature into boiling water.

9 Parasitic Nematodes

Imagine biting into a thick, glossy fillet only to discover a tiny, coiled worm nestled in the flesh. Many popular fish—especially trout and salmon—can harbor roundworms of the genus Anisakis simplex. These parasites curl into a distinct spiral and embed themselves in the meat, making for an unwelcome surprise.

Cooking the fish thoroughly neutralizes the threat, but consuming raw or undercooked seafood can lead to anisakiasis, a painful condition marked by vomiting, diarrhea, and cramping. Modern fisheries combat the problem with meticulous light‑based inspections, yet occasional slip‑throughs still occur.

8 The Great Shrimp Vein Debate

Shrimp lovers often wonder whether the dark “vein” running along the back—the crustacean’s intestine—needs to be removed before cooking. The vein can contain remnants of the shrimp’s last meal, potentially imparting a gritty texture, especially in larger specimens.

For bite‑size shrimp, the vein is usually so fine that it’s barely noticeable, and many chefs leave it intact. Opinions differ: some swear they taste a subtle difference, while others say it’s purely aesthetic. In the end, the decision rests on personal preference, not on any health risk.

7 The Salmon Of Knowledge

Irish mythology tells of a mystical salmon whose flesh grants the consumer extraordinary wisdom. The druid Finnegan waited patiently for the fish to glide by, hoping to eat it and become all‑powerful.

When the salmon finally appeared, Finnegan captured it, but he enlisted a young apprentice named Demne to do the cooking. In the heat of the kitchen, Demne accidentally burned his thumb, instinctively slipped it into his mouth to soothe the pain, and instantly absorbed the fish’s magical knowledge.

Finnegan, expecting the wisdom for himself, was left empty‑handed, while Demne—now known as Fionn—went on to become a legendary Irish chieftain, wielding the Salmon of Knowledge’s gifts.

6 Shark Finning

Shark finning—snipping a shark’s dorsal fin and discarding the helpless animal back into the sea—has long been condemned as a barbaric practice. The fin is prized for its gelatinous texture in upscale shark‑fin soup, a dish that can fetch up to $100 per bowl in China.

Recent legislation in the United Arab Emirates and several other nations now bans the practice, requiring fishermen to bring the entire shark back to port. This move tackles both the cruelty of mutilation and the wasteful loss of a massive predator.

Beyond the ethical concerns, the fin contributes little flavor; its primary role is to provide a unique, silky mouthfeel. The practice, therefore, kills millions of sharks each year while offering negligible culinary benefit, pushing many shark species toward the brink of extinction.

5 Raw Fish Is Usually Frozen

In the United States, most sushi and sashimi you enjoy has been deep‑frozen long before it reaches your plate. The FDA mandates that raw fish be frozen at temperatures low enough to kill parasites and harmful bacteria, ensuring safety for consumers who relish raw preparations.

Tuna is the notable exception; many establishments still freeze it as a precaution, sometimes storing it for up to two years. Surprisingly, seasoned sushi aficionados often cannot discern any difference between frozen and truly fresh tuna.

Because inspections are limited, it’s impossible to guarantee every piece of sashimi has been properly frozen. Ambiguities in the regulations mean that either the supplier or the restaurant may assume the other has already completed the freezing step, leaving a small but real risk for diners.

4 Mahi Mahi Is Not Dolphin

Confusion often arises because the fish known as mahi‑mahi was originally called the “dolphinfish.” Early sailors noticed these bright, fast‑swimming creatures hanging out beside boats and mistakenly linked them to dolphins.

When consumers realized the name could cause a public‑relations nightmare—no one wants to eat a dolphin, after all—industry leaders rebranded the species as mahi‑mahi. In Hawaiian, “mahi” means “strong,” a fitting tribute to the fish’s vigor.

Today, the name change helps avoid the unsettling association and lets diners enjoy a tasty, low‑mercury fish without the ethical baggage of dolphin consumption.

3 Scandinavian Fish Spread

While peanut butter reigns supreme in American pantries, Scandinavians have their own beloved spread: a salty, fish‑based paste made from herring roe or pickled herring. These creamy concoctions are a staple on open‑faced sandwiches across the region.

Research from Swedish universities highlights the health benefits of these spreads, especially their rich omega‑3 content, which supports heart and brain health. The spreads are often sold in glass jars, ready to slather on rye bread.

If you’re curious to try this northern delicacy, you can find it at IKEA’s food market, where the brand offers a variety of flavored fish spreads that bring a taste of Scandinavia to your kitchen.

2 Eating Shellfish Only During ‘R’ Months Isn’t Necessary

The old “R‑month” rule advises diners to consume shellfish only in months that contain the letter “r” (September through April). Historically, this guidance helped people avoid summer‑time algal blooms that could poison shellfish, and it also coincided with the animals’ breeding season, when flavor can suffer.

Native American communities originally passed the rule to early European settlers, who found it practical for safety and taste. During those months, the risk of toxin‑laden shellfish was genuinely higher.

Modern aquaculture and global supply chains have largely eliminated those seasonal hazards. Today, most shellfish are farm‑raised under strict controls, and many are imported from cooler waters during summer, making the “R‑month” caution largely obsolete for the average shopper.

1 Eels And The Discovery Of Anaphylaxis

Eel is a unique seafood that must always be cooked, even in cuisines that otherwise favor raw preparations. The fish’s blood contains a potent toxin that isn’t neutralized by freezing, so consuming it undercooked can be deadly.

The toxic protein in eel blood resists standard freezing methods, meaning only thorough cooking can render the flesh safe. This makes eel a rare exception among popular sushi ingredients.

Beyond its culinary dangers, eel blood played a pivotal role in medical history. In the early 1900s, French physiologist Charles Richet injected tiny amounts of eel blood into dogs, hoping to build resistance. Instead, the animals suffered severe anaphylactic reactions—sudden, potentially fatal allergic responses.

Richet’s observations earned him the Nobel Prize in Medicine, opening a new field of allergy research. Today, his work reminds us that even a seemingly humble sea creature can unlock profound scientific breakthroughs.

Gregory loves seafood.

For as long as humans have been casting nets and pulling in a catch, they have also been squabbling over who gets the tastiest morsel. The saga of these 10 bitter conflicts shows that seafood can be just as divisive as oil or gold. While we lack tales of prehistoric people brawling over a prized trout, history is packed with riots, international standoffs, and even armed skirmishes sparked by fish, crustaceans, and mollusks.

Why These 10 Bitter Conflicts Matter

Understanding these clashes helps us see how deeply food security, national pride, and local economies intertwine. Each dispute reveals a different facet of human nature—greed, tradition, and the fierce protectiveness of a community’s livelihood.

10 1959)

The Oyster Wars erupted shortly after the Civil War when the Chesapeake Bay oyster boom turned the region into a gold rush for shellfish. Towns sprouted along the water, each attracting fortune‑seekers eager to claim the richest beds. Tensions boiled over as locals and newcomers clashed, and when the newcomer supply dwindled, the locals turned their guns on one another. Gunfire rattled between Maryland and Virginia watermen, and even intra‑state feuds broke out among fishermen from different counties.

State authorities eventually stepped in, creating Maryland’s infamous “Oyster Navy,” a maritime police force that proved largely ineffective. In 1882, Virginia’s governor William Cameron dispatched a militia to seize seven vessels suspected of illegal dredging in the Rappahannock River. Skirmishes over oyster territory persisted for decades, culminating in 1959 when Maryland patrollers fatally shot Virginian waterman Berkeley Muse. To finally halt the century‑long bloodshed, Maryland and Virginia signed a compact that put an end to the Oyster Wars.

9 Palingoproer: The Dutch Eel Riot (1886)

In 19th‑century Amsterdam, a quirky pastime called eel‑pulling (palingtrekken) thrilled crowds. A rope strung across a canal held a live eel in the middle, and daring men in small boats tried to yank the slippery creature free. The winner earned six guilders—a tidy sum at the time. Though the sport was outlawed by the 1880s, its popularity didn’t wane.

On July 25, 1886, a bustling session on the Lindegracht Canal was abruptly halted when police intervened, cutting the eel loose. Legend says a falling rope struck a spectator, who then beat the officers with an umbrella. Within hours, a full‑blown riot erupted: onlookers hurled bricks at the police, and the chaos continued into the night. The following day, the army opened fire on rioters storming the police station. The tragic outcome left twenty‑six civilians dead and thirty‑two seriously injured, marking the Palingoproer as one of the most severe instances of police brutality in Dutch history.

8 Newlyn Mackerel Riots (1896)

Newlyn, a historic fishing port on England’s western coast, was dominated by devout fishermen who refused to work on the Sabbath. Meanwhile, large fishing firms from England’s east coast happily cast their nets on Sundays, delivering their catch to market on Monday and fetching premium prices. The disparity left Newlyn’s observant fishermen bitter, especially when, in May 1896, Tuesday’s market price for 120 mackerel plummeted to a meager three shillings.

On May 18, fed‑up locals boarded the eastern vessels and flung thousands of mackerels back into the sea. The unrest spread to other Cornish communities, where fishermen attacked eastern boats and erected barriers to block harbor access. Authorities eventually called in the military; after a standoff involving stone‑throwing, order was restored, and the eastern companies continued their Sunday fishing unabated.

7 1976)

Cod has long been a cornerstone of global economies, and it’s no surprise that nations have tussled over its harvest. The so‑called Cod Wars between the United Kingdom and Iceland span several centuries, with the first recorded clash in 1415 when English officials arrested a Danish envoy in Iceland, then a Danish territory. This incident sparked a treaty that was renegotiated repeatedly, each side waiting for political upheaval in the other to gain an edge in the cod trade.

The 20th‑century Cod Wars consisted of three confrontations featuring warning shots, net‑cutting, and occasional ramming. Though the naval skirmishes were relatively minor, they resulted in just two recorded fatalities: a British fisherman and an Icelandic engineer. Ultimately, Iceland emerged victorious, securing treaties that effectively ended Britain’s long‑distance cod fishing in Icelandic waters.

6 1964)

The crux of the Lobster War between France and Brazil hinged on a seemingly simple question: do lobsters crawl or swim? Brazil argued that spiny lobsters crawl along the continental shelf, making them solely Brazilian resources. France countered that lobsters swim like fish, granting any nation the right to harvest them. After French vessels were reported catching lobsters off Pernambuco, Brazil’s president gave France a 48‑hour ultimatum to withdraw. When French boats refused, the Brazilian Navy seized one vessel and barred all French boats from its coast.

The following year Brazil captured three more French ships, escalating the dispute. Resolution finally arrived in 1964 when both nations agreed to extend Brazil’s exclusive economic zone while permitting limited French lobster fishing. No blood was shed, but biologists on both sides continued debating the locomotion of lobsters for years thereafter.

5 1981)

After the Vietnam War, Vietnamese refugees settled around Galveston Bay, Texas, finding work on shrimp boats. Their growing presence alarmed local white shrimpers, who saw the newcomers as competition for the bay’s limited resources. Violence erupted in 1979 when a fistfight led to a white crabber being shot and several Vietnamese vessels set ablaze. The tension attracted the Texas Knights of the Ku Klux Klan in 1981, who staged armed demonstrations and threatened Vietnamese shrimpers with pistols and paramilitary gear.

A lawsuit filed by the Southern Poverty Law Center exposed a video of KKK leader Louis Beam urging his militia to “utterly destroy everybody.” The legal action forced the Klan’s harassment groups to disband, but not before many Vietnamese shrimpers had fled or suffered property loss. The episode inspired the 1985 film Alamo Bay and foreshadowed the rise of contemporary white supremacist movements that continue to threaten minority communities.

4 Turbot War (1995)

In 1995, the Canadian Coast Guard seized the Spanish trawler Estai, accusing it of exceeding its Greenland turbot quota in international waters off Newfoundland. Canada labeled the seizure an act of “organized piracy,” while the European Union condemned the move. In the weeks that followed, Canadian vessels cut the nets of three additional Spanish and Portuguese boats, intensifying the standoff.

Spain responded by dispatching a warship to protect its fleet, prompting a diplomatic showdown. Ultimately, Canada and the EU reached an agreement that bolstered fishing enforcement and raised Spain’s turbot quota, bringing the dispute to a close. No turbots attended the negotiations—just a very heated dinner table.

3 2020)

In October 2012, roughly forty French vessels encircled a handful of British fishing boats off the French coast. French fishermen were furious that their nation prohibited scallop harvesting between May and October, while British boats could fish year‑round. According to the British, French crews hurled stones, nets, and even taunts that could have been ripped from a Monty Python sketch.

Violence flared again in 2018 and 2020, with French fishermen reportedly tossing frying pans, flares, gasoline bombs, and oil at their British rivals. The animosity remains palpable, proving that even within Europe, a scallop can spark serious discord.

2 Guang Da Xing No. 28 Incident (2013)

On May 9, 2013, a Filipino Coast Guard patrol boat opened fire on the unarmed Taiwanese fishing vessel Guang Da Xing No. 28 in contested waters. The gunfire struck the boat at least 45 times, killing 65‑year‑old fisherman Hoh Shi Cheng. The incident ignited a diplomatic flashpoint between the Philippines and Taiwan, prompting protests in both nations. A Filipino ex‑policeman even burned a Taiwanese flag publicly, declaring, “Filipinos are not cowards.” Relations have since normalized, and the eight coast guard personnel responsible were convicted in 2019.

1 Nova Scotia Mi’kmaq Lobster Dispute (2020)

The most recent entry on this list is the Mi’kmaq Lobster Dispute, which remains unresolved. A 1999 Supreme Court ruling affirmed that members of the Mi’kmaq tribe have the right to fish on a small scale whenever and wherever they choose. In September 2020, the Sipekne’katik First Nation launched a modest lobster fishery in Nova Scotia, sparking criticism from non‑Indigenous fishermen who argued the operation violated the commercial season.

By October, mobs of non‑Indigenous fishers besieged Indigenous‑owned lobster facilities, hurling rocks, shattering windows, and threatening arson. One facility was set ablaze, and remaining live lobsters were poisoned with PVC cement. Canadian officials have called for peace, yet tensions linger between Indigenous and non‑Indigenous fishermen, leaving the dispute simmering.