Populasi hiu dan pari bukan satu satunya spesies yang terancam punah.

And yet, if you look at whale sharks, which is the other plankton eating large shark, its diversity is much greater.

Sharks are killed for their fins.

Is this cage meant to protect against sharks?

Namun dalam beberapa dekade saja, seperempat jenis hiu dan pari terancam punah.

We kill about 100 million sharks a year.

Go up in your boat and tag the shark.

Tom devoted his whole life to studying sharks.

Many shark species are threatened with extinction.

Is this cage meant to protect against sharks?

We use a pole camera on the boat to actually film shark.

We're often all frightened of sharks thanks to Jaws.

You can only rarely be in the right place to find sharks into August.

Scientists conducted radiocarbon analysis of the eye lenses of 28 Greenland sharks.

After their fins have been removed, the sharks are thrown back alive into the ocean.

And then they'd tow the sharks back to Purteen Harbor, boil them up, use the oil.

If you look at the first line really, you can see that all these different shark species are all quite similar.

Female Greenland sharks only reach sexual maturity by the age of 150.

Mong Palatino How can social media tools contribute in the effort to protect whale sharks? Jason Holmberg More and more people are posting their whale shark videos online, and YouTube and Vimeo are proving to be very rich social media platforms for us!

Sharks are found in all seas and are common to depths of .

If you look at nucleotide diversity, which is more genetics that are passed on through parents, you can see that basking sharks, if you look at the first study, was an order of magnitude less diversity than other shark species.

Maxim's claim they only serve shark fin soup made from blue sharks, but according to recent scientific evidence, blue shark populations around the world are being wiped out by greedy overfishing.

Probably the best documented basking shark fishery in the world is that from Achill Island.

One thing that I think is a very surprising and strange thing is just how low the genetic diversity of sharks are.

RP Silvertip sharks they're actually three species of sharks here.

Sharks are a common seafood in many places, including Japan and Australia.

Maybe five or six people get killed by sharks every year.

And we thought that basking sharks were temperate animals and only lived in our latitude.

We also see sharks, much more regularly than I would have expected to.

Sharks have been seen from the rigging it is not safe to bathe any longer be quick, get into the boat.

So I don't know what the balance is, but I think sharks have got more right to be fearful of us than we have of them.

Another colleague in the States tagged about 20 sharks off Massachusetts, and his tags didn't really work.

On a hot August day in 2015, citizens noticed shark fins circling around the pirate galleons.

They rejected all but the porbeagle shark, pointing out that regulators have to be able to tell fins of different species apart to enforce the law, previously thought to be an impossible task.

The black, you can't really see this, but these are Norwegian basking shark hunting vessels, and the black line in the crow's nest signifies this is a shark vessel rather than a whaling vessel.

And about two and a half, 3,000 sharks were killed up till '85, many by Norwegian vessels.

And it's a fantastic opportunity in science to see and experience basking sharks, and they are awesome creatures.

They found that there was no genetic differentiation between any of the world's oceans of basking sharks.

Do you remember how many they killed off Achill there in the 70s and the 50s?

Two young men have been killed by tiger sharks on Australian beaches in the past two weeks.

For example, with respect to sharks, existing sanctions against finning under Regional Fisheries Management Organizations should be enforced, backed up by an independent system of on board observers to ensure that trawlers comply.

We have more sharks, more biomass of snappers, more biomass of herbivores, too, like these parrot fish that are like marine goats.

I'll give you some examples. Lets talk about dentists, vasectomies, guns and shark attacks. Okay?

And then finally to basically get the message home maybe use live links from animals such as blue whales and white sharks.

Moreover, an international action plan for sharks, including a ceiling on catches, should be created.