11 Facts About Mako Sharks

iStock.com/Alessandro De Maddalena
iStock.com/Alessandro De Maddalena

Though dwarfed by the closely related great white shark, makos are impressive fish in their own right: They're speedy, powerful predators that have been featured in famous literature and have a bizarre connection to election forecasting. Read on to learn more.

1. There are two species of mako shark.

For over 150 years, marine biologists thought there was only one type of mako shark: the shortfin mako (Isurus oxyrhinchus), which got its scientific name in 1810. A second mako—the longfin mako (Isurus paucus)—wasn't recognized as its own separate species until 1966.

Identifying the second species took so long both because the makos look similar—both are open ocean predators with conical snouts and bluish-grey skin with white underbellies. They’re also found in many of the same areas (they prefer warm waters, and typically hang out in tropical or subtropical portions of the Atlantic, Pacific, and Indian Oceans). One way to figure out which is which is by comparing the flanks: The longfin mako is so named because, as the name implies, it’s got much longer pectoral fins. It's also a longer shark overall.

2. The longfin mako is the second-biggest Lamnidae shark.

The Lamnidae family includes the salmon shark, the porbeagle, and the great white. In terms of size, a full-grown great white, at 19.6 feet long, is the biggest. Next comes the longfin mako, which has a maximum known length of 14 feet. Even the biggest shortfins reach just 12.8 feet long.

3. Shortfin mako shark can reach speeds of at least 31 mph.

The shortfin mako is built for speed. Its body has a streamlined, bullet-like shape that minimizes water resistance, and its pectoral and dorsal fins are rather short, so they don’t create much drag—all features that combine to allow the sharks to slice through the ocean with ease. The scales behind the gills and along its sides are flexible; they can bristle upwards at an angle of over 60 degrees, and there’s some evidence to indicate that shortfin makos use these scales to manipulate the flow of water around their bodies, reducing drag still further. These adaptations help the shortfin mako reach speeds of at least 31 mph. Unverified estimates put the top speed of adult shortfin makos at 45 mph or more, and a juvenile shark was once estimated at 60 mph (though that measurement might not be 100 percent reliable).

Just how fast the longfin mako can swim is unclear. Fewer researchers have studied this fish in detail, but due to its longer fins, the shark is probably slower.

4. Mako is a word with Māori roots.

Shark tooth necklaces and earrings were traditional attire in the culture of the Māori of New Zealand. Mako is Māori word that can mean either “shark” or “shark tooth.” Longfin makos are not known to occur in New Zealand waters, but shortfins frequent the area, with the fish being especially common around the northern end of the country.

5. Male and female shortfin makos seem to avoid each other.

Beginning in December 2004, biologist Gonzalo Mucientes and his colleagues spent four months gathering data on sharks in the southeastern Pacific. Unexpectedly, they found adult shortfin makos practicing sexual segregation. On one side of an imaginary, north-south line between Rapa Nui (Easter Island) and the Pitcairn Islands, the team discovered male shortfins almost exclusively. The other side yielded many more females than males. Another study noticed this same kind of sexual divide among shortfin makos in the north Pacific. Scientists theorized that adult shortfin makos steer clear of the opposite sex for extended periods so the females who aren’t looking to reproduce can avoid harassment from males.

6. Shortfin mako growth and maturation rates are slow.

When they're born—after a gestation period that is believed to last 15 to 18 months—shortfin pups are 25 to 28 inches long. According to a 2009 study, males become full-fledged adults at between 7 and 9 years of age, but females don't hit that benchmark until they're between 18 and 21. The species has an estimated lifespan of 29 to 32 years—so when a given population of shortfin makos declines, the slow maturation rates can make it difficult for these fish to bounce back.

7. Some makos hunt swordfish.

You might say the shortfin mako enjoys fast food: The shark is a quick carnivore who chases down other high-velocity fish. Bluefish are a favorite meal: In an examination of 399 shortfin mako carcasses, bluefish remains turned up in 67 percent of their stomachs. The sharks will also go after squid, tuna, and billfish, plus the occasional dolphin or porpoise.

They're also known to attack swordfish and sailfish. Unfortunately for the sharks, those fish use their sharp beaks to impale attackers. Shortfin makos with stab or puncture wounds are a common sight; one female shark was found dead with a broken-off sailfish beak lodged in her eye. Reports of similar injuries on longfin makos tell us that this species also has an antagonistic (and probably predatory) relationship with powerful swordfish.

8. Shortfins sometimes jump into boats.

Big, fast, and tenacious, the shortfin mako is a prized game fish around the world—but grappling with one is quite the challenge for anglers. “The feel of most sharks on a fishing line is like hauling on wet laundry or trying to lift a cow,” wrote Jaws author Peter Benchley. “Fighting a mako has been compared to riding a bull or wrestling an enraged crocodile.”

It gets even tougher if the fish go airborne. Shortfin makos can reportedly leap up to 20 feet out of the water, often after getting caught on a fisherman’s line. That leads to a lot of weird-but-true headlines about makos who have propelled themselves onto boat decks. In 2013, a hooked shortfin weighing 303 pounds hopped aboard a private fishing vessel off the coast of New Jersey, causing $5000 in damages. Four years later, a 10-footer was released back into Long Island waters after it had burst from the ocean and gotten stuck under the guard rail of a chartered boat.

9. One species is prized for its meat.

The shortfin mako puts up a good fight, but that’s not the only reason why fishermen target them. “They’re unlucky enough to be one of the few shark species that is commercially viable for their meat,” wildlife ecologist Michael Byrne told Popular Science. Shortfin mako meat has a swordfish-like taste and has long been used as an ingredient in everything from stews to fish tacos. Longfin mako is sometimes eaten as well, but according to the University of Florida, longfin meat is considered to be lower in quality. However, the longfin is still actively hunted down for its namesake fins, which can fetch high prices as decorative items.

If a species can be fished, it can be overfished. The International Union for Conservation of Nature (IUCN) classifies both mako species as “vulnerable,” a designation it reserves for animals that might soon become endangered. Many of these sharks get accidentally captured when schools of tuna or swordfish are reeled in by large-scale fishing operations. Also, scientists think the shortfin’s slow maturation rates have contributed to its decline in many areas.

10. Ernest Hemingway wrote about them.

In The Old Man and the Sea—one of his final works, and the novel that won him a Pulitzer in 1953—Hemingway wrote a mako shark into a scene with the book's main character, Santiago, a Cuban fisherman who is trying to land an Atlantic blue marlin. He successfully harpoons one, but nearly loses his catch to a mako:

“The shark was not an accident. He had come up from deep down in the water as the dark cloud of blood had settled and dispersed in the mile deep sea. He had come up so fast and absolutely without caution that he broke the surface of the blue water and was in the sun … He was a very big Mako shark built to swim as fast as the fastest fish in the sea and everything about him was beautiful except his jaws.”

A fight ensues between man and beast. Santiago kills the shark, but not before it rips off 40 pounds of marlin meat, thus guaranteeing that other predators will flock to the corpse.

11. Florida researchers are using makos to predict election results.

Who needs polling data when you’ve got prognosticating sharks? Researchers at Nova Southeastern University in Fort Lauderdale, Florida, use satellite tags to survey wild sharks. In the fall of 2016, the scientists decided to advertise their program by using tracking data from two makos to try and predict the outcome of that year’s presidential election. Both fish were named after one of the candidates and it was decided that whichever shark had swum the farthest between September 26 and November 1 would be declared the winner. Within that timeframe, the Donald Trump shark swam 652.44 miles to the Hillary Clinton shark’s 510.07. The school used the same method to try to determine the outcomes of Florida’s 2018 Senate and gubernatorial races, crowning Ron DeSantis and Bill Nelson the winners. (DeSantis won; Nelson did not.)

This Smart Accessory Converts Your Instant Pot Into an Air Fryer

Amazon
Amazon

If you can make a recipe in a slow cooker, Dutch oven, or rice cooker, you can likely adapt it for an Instant Pot. Now, this all-in-one cooker can be converted into an air fryer with one handy accessory.

This Instant Pot air fryer lid—currently available on Amazon for $80—adds six new cooking functions to your 6-quart Instant Pot. You can select the air fry setting to get food hot and crispy fast, using as little as 2 tablespoons of oil. Other options include roast, bake, broil, dehydrate, and reheat.

Many dishes you would prepare in the oven or on the stovetop can be made in your Instant Pot when you switch out the lids. Chicken wings, French fries, and onion rings are just a few of the possibilities mentioned in the product description. And if you're used to frying being a hot, arduous process, this lid works without consuming a ton of energy or heating up your kitchen.

The lid comes with a multi-level air fry basket, a broiling and dehydrating tray, and a protective pad and storage cover. Check it out on Amazon.

For more clever ways to use your Instant Pot, take a look at these recipes.

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Researchers Just Unearthed ‘Lost’ Footage of the Extinct Tasmanian Tiger—Watch It Here

A Tasmanian tiger, or thylacine, in captivity circa 1930.
A Tasmanian tiger, or thylacine, in captivity circa 1930.
Topical Press Agency/Hulton Archive/Getty Images

For 85 years, the last known footage of the now-extinct Tasmanian tiger sat forgotten in the National Film and Sound Archive of Australia (NFSA), until it was recently unearthed by researchers from a Facebook group called the Tasmanian Tiger Archive.

The NFSA’s newly digitized 21-second clip is part of a nine-minute travelogue called Tasmania the Wonderland from 1935, presumed to be the work of Brisbane filmmaker Sydney Cook (though the film is missing its credits, so that remains unconfirmed). It shows a striped, dog-like creature named Benjamin—the last of his kind ever in captivity—pacing his cage at Tasmania’s Beaumaris Zoo, which shut down in 1937.

Tasmanian tigers aren’t actually tigers—they’re carnivorous marsupials called thylacines. TreeHugger reports that the species died out in mainland Australia about 2000 years ago, but they managed to survive in Tasmania until the 20th century. Though thylacines were officially declared extinct after Benjamin died from suspected neglect in September 1936, the status has been highly contested to this day.

“Do I think the animal is extinct?” Neil Waters of the Thylacine Awareness Group of Australia told HowStuffWorks. “No, because I have seen two and been coughed/barked at by one in South Australia in 2018. There have been more than 7000 documented sightings of thylacines (or animals that appear to be thylacines), with the majority of those sightings on mainland Australia.”

Considering that fewer than a dozen known clips—a total of just over three minutes—of film footage showing thylacines exist today, Benjamin’s 21 seconds of fame in Tasmania the Wonderland is a monumental rediscovery. And, since thylacines were exhibited in zoos in Washington, New York, Sydney, Berlin, and other cities after the advent of film, the NFSA is optimistic that more footage could turn up in time.

[h/t TreeHugger]