You see a dolphin here, and there's a dolphin, and there's a dolphin.

Now, a dolphin, mother dolphin, any dolphin there's only one way that a PCB can get out of a dolphin.

Some of them were dolphin liver. Some of them were dolphin blubber.

The death rate in these dolphins, for the first calf born of every female dolphin, is 60 to 80 percent.

When a male dolphin leaves Mom, it will often join up with another male and form an alliance, which may last for decades.

A dolphin is a mammal.

Or the blowfish.

By contrast, the signature whistle which dolphins use to stay in touch, each individual here has a radically different call.

Those females, they're not trying to.

A dolphin is a kind of mammal.

The blowfish is like the Incredible Hulk.

The dolphin is a very intelligent animal.

In normal life for mother and calf dolphin, they'll often drift apart or swim apart if Mom is chasing a fish, and when they separate they have to get back together again.

That's a dolphin tail there, guys.

It oscillates its tail up and down like a dolphin.

Dolphins and toothed whales use echolocation.

I'm going to draw this blowfish uninflated.

Juveniles a huge load.

Dolphins, pretty big brains, play a lot.

For example, in oceanography, a lexicon of dolphin language is actually being created by basically visualizing the sonar beams that the dolphins emit.

The dolphins eat the fish that have PCBs from the plankton, and those PCBs, being fat soluble, accumulate in these dolphins.

Baby dolphin and baby llamas. Everybody look.

Of the ones that stayed, their reproductive rate declined.

Here's a dolphin where the fin's been re attached.

In 2004, the police department re commissioned the police launch Dolphin.

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Animals like the Ganges river dolphin which is just down to a few left, and it is also critically endangered.

And at this age, my personal idol was Flipper the dolphin.

If you are a child under the age of 10 who haven't been ruined yet, you will look at this image and see dolphins. Now, some of you adults here are saying, What dolphins? What dolphins?

So what you see in this particular ambiguous figure is, of course, the dolphins, right?

I study fish, also the bigger things, whales and dolphins.

And I was thinking of humpback whales breaching and dolphins.

Here's a diagram of the PCB load of dolphins in Sarasota Bay.

Even though they were labeled whale meat, they were dolphin meat.

The dolphin and trainer communicated much better than we expected.

This is a calf in captivity making an imitation of that trainer's whistle.

Whales also have contact calls like I described for the dolphins.

And if we look at a very pristine environment like western Australia, Lars Bider has done work comparing dolphin behavior and distribution before there were dolphin watching boats.

Methyl mercury bio accumulates up the marine food chain to create high concentrations in predatory species of fish such as shark, swordfish and tuna, as well as marine mammals such as whales, dolphins and porpoises.

And those dolphin parts had a huge load of PCBs, dioxins and heavy metals.

But at least it's labeled correctly, and you're no longer going to be buying toxic dolphin meat instead.

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So he moved away from it, turned around a few minutes later, it was right next to the side of the boat again.

It turns out that a lot of dolphins are being sold as meat in the whale meat market around the world.

Thank you so much. I'm going to try to take you on a journey of the underwater acoustic world of whales and dolphins.