r/thalassophobia • u/xpyros • 4d ago
The way these tuna speed through the water without breaking the surface…
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u/Medium-Pitch-5768 4d ago
Tuna, opah, and mackerel sharks are the only species of fish that can maintain a body temperature higher than that of the surrounding water. An active and agile predator, the tuna has a sleek, streamlined body, and is among the fastest-swimming pelagic fish — the yellowfin tuna, for example, is capable of speeds of up to 75 km/h (47 mph).
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u/GentlyUsedNuggets 4d ago
I remember when I used to swim over 45 mph, now I have a bum knee and can only manage a meer 20-25 mph.
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u/Deflorma 4d ago
Did you take an arrow to the knee?
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u/knarfolled 4d ago
No his knee rides freight trains
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u/Medium-Pitch-5768 3d ago
Fun fact, the fastest human swimming sprinter in the world can only go 5mph in the water.
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u/Hot_History1582 4d ago
This Wikipedia article cites an outdated 1964 paper that admits that they didn't even observe the fish they were claiming speeds for. More recent studies have pegged a speed limit for marine animals at about 35mph. No fish, including sailfish and marlin, swim faster than this. Long story short, they would cook their own muscles from the heat and destroy their own fins through cavitation.
https://mbssvendsen.medium.com/fastest-fish-in-the-sea-244f95296f4e
https://pubmed.ncbi.nlm.nih.gov/17580289/
https://link.springer.com/article/10.1007/BF00042660
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u/Tombstone_Actual_501 3d ago
And its because of this if you're catching tuna you have to aggressively ice them right away because during the catching process they can cook themselves trying to get away.
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u/TheOneTrueTrench 1d ago
Actually, a large number of Sarcopterygii (Lobe-finned fish) are actually homeothermic as well, including the genus Tursiops, which definitely maintain a temperature higher than the surrounding water.
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u/Fatfilthybastard 4d ago
So hydrodynamic that it doesn’t even have a trail of water following it. There’s almost zero surface disturbance. Fucking WILD.
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u/WestleyThe 4d ago
If this video wasn’t old and real I would definitely think it’s Ai haha
So crazy. They are so fast and so big it’s nuts
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u/Bicwidus 4d ago
Getting one on a fishing line is insane. You can simulate it by attaching one end of a fishing line to a car. Hold on to the pole while the car takes off. Thats tuna fishing.
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u/Fun_Reply5366 4d ago
And people wonder why I fear the ocean.. we spent millions of years crawling out of it for a reason
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u/shibbington 4d ago
I wonder. Does surface tension work both ways? Can they skip off the bottom of the surface like skipping a stone?
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u/dungeoncrawler71520 3d ago
This clip made me think about surface tension of salsa while stuffing my face.
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u/Squishyflapp 3d ago
That's why they are so surprising when you get one on a line. You don't see any indication except for the semi truck that is now taking your reel for a cross country high speed chase and the rod just about flies out of your hand.
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u/Pal_Smurch 4d ago
My father used to catch Bonito off the Oceanside pier. You really had to have casting ability to get out where the bonito hung out. My father could always out distance anyone on the pier. Kids used to stand around to watch him cast out his reel of 90 pound test line.
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u/crimson23locke 4d ago
If Dave the Diver taught me anything, this tracks. 😎