The tail that Tuna have is described as a high aspect ratio tail. That is the depth of the tail squared divided by the surface area (dimensionless quantity) stays fairly constant as the fish grows larger. Frictional drag force is quadratically dependent on the transverse speed of tail oscillation. Drag force is also dependent on tail surface area. That is why where the oscillation speed is high to reduce the drag effect is by having that crescentic moon shape tail of low surface area. So from an evolutionary point of view speedster fish, tuna, wahoo, sailfish, marlin have evolved to having these high aspect ratio, crescentic moon shaped tails.

Man Paul's a knob. One day a chilled out lad will do a fishing show without the hype and over-excitement, and less talking. Just pure fishing.

I am so surprised at how these absolute guns of fishermen are KIDS!!! Great work. If I'm ever in Tas, I'm looking you up!!!

This was amazing really enjoyed seeing this really impressed by how you all worked as a team and really enjoyed how you all was excited to see the fish swim away the memories of this will stay with you forever well done

Awesome video. Lachy is a natural in front of the camera and he sure seems to know his stuff!

Just amazing lockie and the girls at such young ages just wicked 👏 👏

Stunner! Well done 😍

We were literally just talking about doing this trip when the bans lift.

Come on Pauly..... Everyone knows Cristy’s suitcase is purple.

And the group hug at the end said it all 👍

Great game fish excellent skills Love your work. Top Tuna

One of my favourite places

Awesome how you catch the tuna leaving it half dead from the trauma and struggle, and having it die with exhaustion within 24 hours of tagging. Absolutely incredible!

Paul to me youre a legend

Good stuff Larry

Awesome!

Let-em go let-em grow Fish On !!

Paul when do you think the ban on fishing in vic will subside?

One word WOW !!! 👌👌👌👌👌👌

Was that hook up just down Tasman side of fortascue bay?

Do they get big kings down there too?

Unbelievable!

9:00 Fishing is priority.. bang fish on!

right place @ the right time

That is huge!!!!

got bored of FB live so watching this instead...lolllll

Fantastic! Paul, how you can talk coherently through all that!?!! I am impressed with your skills!

That fish might have lived one more day.

7:37 Faith No More will be looking for Royalties off this band

Lactic acid build up kills fish after long extended battles. You can't use light gear for big fish, fight it for hours and expect them to survive. Man that fish probably died later that night. 4 hours? lol

Just 👍👍👍

How do the southern bluefin differ from the Atlantic bluefin? Besides the ocean they live in.

Lee Rainer gonna knock him out

First love ya Paul

Persuade the seals to move on!

"Big fact cows of the sea..." Eh no....

Why in the world didn't they haul it in and sell it? They released a fish worth at least $50K. Or thereabouts.

No life jackets on anyone.

After it got away it got eaten by a great white 30 seconds later

I lost a salmon and the lure to a seal not quite the same level as a tuna but still

Are you from nz

Hi

I know 100% that wasn't 10-12kg of drag pulling it that easy. For that much drag you have to twist the line around your hand for grip even with mono

Why are you running your outboards with the covers on? Heard thats a no no

click bait?

Who saw the rod change from pink line to blue crazy right first one they say

Lol, I get nauseated when you're driving on the wrong side of the road ...

Learn how to turn off the clicker when your winding....

I seriously question the skills of the boat driver. Appears to be constantly driving off the fish rather than reversing on to it whenever it makes a run. Simply drifting down wind is poor technique. Can drastically shorten the time to land, and increase fish survival rate by reversing into the direction of run as much as possible (swell permitting). After 4hours of fight like that, its post release survival is extremely low (proven IMAS fact)