Quantcast
Environmental News for a Healthier Planet and Life

Help Support EcoWatch

9 Facts That Will Change How You Think About Sharks

Popular
9 Facts That Will Change How You Think About Sharks
iStock

By Jen Sawada

Sharks have been around for 400 million years, before the time of the dinosaurs, but there's much more to them than big teeth and summer blockbusters. Consider these facts, which will change what you think about sharks.


No Need to Fear the World’s Biggest Shark

Andre Seale

Whale sharks are gentle giants of the ocean, often growing as long as 40 feet. They swim with their mouths open to filter-feed on small fish, invertebrates and plankton. While whale sharks aren't seen on Shark Week as often as jagged-toothed great whites are, they do attract large audiences of divers—contributing about $47.5 million worldwide each year.

Some Sharks Can Walk

There's a shark species found off the coast of Indonesia that doesn't just swim around. It gets from place to place by walking on the ocean floor.

Rays Are Flat Sharks

Christian Grondin

Though they look different, rays are closely related to sharks—so closely, in fact, that they're often referred to as flat sharks. These species have cartilage skeletons and float through the water thanks to their oil-rich liver—not the swim bladder on which other fish rely. Mobula rays, pictured above and manta rays have received protections through the Convention on International Trade in Endangered Species of Wild Fauna and Flora.

This Shark Has Many Names—Just Don’t Call Him ‘Jaws’

iStock

You've heard of a great white shark, but what about a white or blue pointer? Turns out, they're all the same species! In Australia, the world's most famous shark is called a white pointer, while in South Africa, it's a blue pointer.

Greenland Sharks Are the World’s Longest-Living Vertebrate

NOAA Okeanos Explorer Program

Last year, scientists discovered a Greenland shark estimated to be 400 years old. That makes this species the oldest known living vertebrate. These slow-growing sharks don't reach reproductive age until around 150, so it's fortunate that they have a long life span to make up for lost time.

Many Sharks Give Birth Like Mammals

Have you ever seen a shark give birth? This may come as a surprise, but many shark species give birth to live young instead of laying eggs. That makes them more like mammals than other fish. Researchers released a video in 2015 of what they think is the first thresher shark birth caught on camera.

Blue Sharks Top the Fin Trade

iStock

These sleek indigo sharks are found in nearly all the world's oceans—and are also the most caught. About 20 million blue sharks are killed every year, most of them for their fins. This heavy fishing has caused their numbers to drop sharply. Fortunately, Samoa and Sri Lanka have proposed giving blue sharks protections through the Convention on Migratory Species (CMS). Other shark species that could receive protections through CMS this year are whale sharks, dusky sharks, wedgefish, guitarfish and angel sharks.

Sharks Prove You Can Go Home Again

Shutterstock

There's no place like home. There's no place like home. Sharks don't have ruby slippers to help them get home, but some species have an amazing innate ability called philopatry, the tendency to return to where they started their lives. Female lemon sharks, for example, swim all the way back to where they were born in The Bahamas to give birth to their young. The island chain is one of 15 shark sanctuaries worldwide, where sharks are safe from commercial fishing.

There Are Some Very Surprising Sharks in the Sea

It's a coral! It's a carpet! It's a … shark? The tasseled wobbegong is one of the more unusual sharks in the ocean, but this bottom-dweller isn't the only unexpected species swimming around reefs. There are more than 500 species of sharks in the world's oceans—and there may be many more that scientists still have not identified.

Jen Sawada is an officer for Pew's global shark conservation campaign, managing efforts to encourage countries in the Pacific and Caribbean to adopt domestic measures to protect sharks, including creating shark sanctuaries.

A meteorologist monitors weather in NOAA's Center for Weather and Climate Prediction on July 2, 2013 in Riverdale, Maryland. Mark Wilson / Getty Images

The Trump White House is now set to appoint two climate deniers to the National Oceanic and Atmospheric Administration (NOAA) in one month.

Read More Show Less

EcoWatch Daily Newsletter

A plastic bag caught in a tree in New Jersey's Palisades Park. James Leynse / Stone / Getty Images

New Jersey is one step closer to passing what environmental advocates say is the strongest anti-plastic legislation in the nation.

Read More Show Less

Trending

Did you know that nearly 30% of adults do, or will, suffer from a sleep condition at some point in their life? Anyone who has experienced disruptions in their sleep is familiar with the havoc that it can wreak on your body and mind. Lack of sleep, for one, can lead to anxiety and lethargy in the short-term. In the long-term, sleep deprivation can lead to obesity, diabetes, and cardiovascular disease.

Fortunately, there are proven natural supplements that can reduce insomnia and improve quality sleep for the better. CBD oil, in particular, has been scientifically proven to promote relaxing and fulfilling sleep. Best of all, CBD is non-addictive, widely available, and affordable for just about everyone to enjoy. For these very reasons, we have put together a comprehensive guide on the best CBD oil for sleep. Our goal is to provide objective, transparent information about CBD products so you are an informed buyer.

Read More Show Less
Speaker of the House Nancy Pelosi (D-CA) talks to reporters during her weekly news conference at the U.S. Capitol Visitors Center on Sept. 18, 2020 in Washington, DC. Chip Somodevilla / Getty Images

The House of Representatives passed a sweeping bill to boost clean energy while phasing out the use of coolants in air conditioners and refrigerators that are known pollutants and contribute to the climate crisis, as the AP reported.

Read More Show Less
Gov. Jay Inslee of Washington comforts Marsha Maus, 75, whose home was destroyed during California's deadly 2018 wildfires, on March 11, 2019 in Agoura Hills, California. Mel Melcon / Los Angeles Times / Getty Images

By Governor Jay Inslee

Climate Week this year coincides with clear skies in Washington state for the first time in almost two weeks.

In just a few days in early September, Washington state saw enough acres burned – more than 600,000 – to reach our second-worst fire season on record. Our worst fire season came only five years ago. Wildfires aren't new to the west, but their scope and danger today is unlike anything firefighters have seen. People up and down the West Coast – young and old, in rural areas and in cities – were choking on smoke for days on end, trapped in their homes.

Fires like these are becoming the norm, not the exception.

Read More Show Less

Support Ecowatch