Common characteristics include the positioning of the pelvic fins (if present), below or in front of the pectoral fins.

The larvae typically have protective spines on the head, over the gills, and in the pelvic and pectoral fins.

Now, finning is the act of taking a shark, cutting the valuable fins off and throwing the live animal back in the water.

So we can save the bluefin tuna.

We've actually taken a sliver of the ocean, put it behind glass, and we together have put bluefin tuna and yellowfin tuna on display.

Here, for over 14 or 15 years, we've actually brought in both bluefin and yellowfin in captivity.

Bluefin are in cave paintings in France.

I put my flippers on. I could barely part my lips.

Bluefin are pursued wherever they go there is a gold rush on Earth, and this is a gold rush for bluefin.

Bluefin are warmblooded like us.

Bluefin have two populations one large, one small.

Now bluefin, in general, goes to one place Japan.

The anal opening is under the head or the pectoral fins.

Now bluefin, in general, goes to one place

Meanwhile, Ernest finds his fins on the internet.

The name Dicentrarchus derives from the presence of two dorsal fins.

That's one of our bluefin at the Monterey Bay Aquarium.

Some of you may be guilty of having contributed to the demise of bluefin.

And voila, next day air, they show up, and they surgically reattach them.

There are actually three species of sharks here.

Then the artist spreads the fins out and pins them down on the board to dry.

Now this guy, this bigfin squid, is seven meters in length.

In most species, their pelvic fins are modified into a sucking disc.

Now, bluefin were revered by Man for all of human history.

The tuna team from TOPP has done the unthinkable three teams tagged 1,700 tunas, bluefin, yellowfin and albacore all at the same time carefully rehearsed tagging programs in which we go out, pick up juvenile tunas, put in the tags that actually have the sensors, stick out the tuna and then let them go.

I doubt anyone has seen a giant bluefin feed.

A pair of kidney shaped electric organs are found at the base of the pectoral fins.

I've been fascinated for a lifetime by the beauty, form and function of giant bluefin tuna.

The European population and North African the Eastern bluefin tuna is fished at tremendous levels

For that, bluefin have been given a status equivalent to tigers, to lions, to certain African elephants and to pandas.

It's hard to study a bluefin on its turf, the entire Pacific realm.

That's the size they have to be to protect the bluefin tuna.

And yet, the type of fishing going on today, with pens, with enormous stakes, is really wiping bluefin ecologically off the planet.

They get returned, and when they get returned, here on a NASA numerical ocean you can see bluefin in blue go across their corridor, returning to the Western Pacific.

Unlike fins and blues, which disperse into the temperate and tropical oceans, the humpbacked whales congregate in local traditional breeding grounds, so they can make a sound that's a little higher in frequency, broader band and more complicated.

For that, bluefin have been given a status equivalent to tigers, to lions, to certain African elephants and to pandas.

So blue whales and fin whales produce very low frequency sounds that can travel over very long ranges.

You find muscular tubes, modified legs, modified fins, as well as the mammalian fleshy, inflatable cylinder that we're all familiar with or at least half of you are.

And yet, the type of fishing going on today, with pens, with enormous stakes, is really wiping bluefin ecologically off the planet.

And every single day these tuna, bluefin like this, are stacked up like cordwood, just warehouse after warehouse.

We're still killing bluefin tuna truly endangered and much more valuable alive than dead.

The silvertips are the one with the white edges on the fin, and there're also gray reef sharks and some hammerheads off in the distance.

The European population and North African the Eastern bluefin tuna is fished at tremendous levels 50,000 tons over the last decade almost every year.

While the placement in Syngnathiformes seems to be correct for the latter, the former is possibly an actinopterygian order of its own.

When wrapped around limbs and fins, it can cause circulation loss and amputation, especially as the animal grows.