#marinebiology #kpassionate #whales
Animals like sea otters, seals, sea lions, and whales have very interesting adaptations for diving to the depths that they need to in the ocean. Learn about those depths and take a look at some of the deepest diving animals on earth!

00:00 Introduction
00:42 How Deep Can Humans Dive?
01:47 How Deep Do Sea Otters Dive?
02:30 How Deep Can Seals Dive?
03:13 How Deep Do Elephant Seals Dive?
03:41 How Can Marine Mammals Dive So Deep?
04:41 How Deep Do Whales Dive?
05:10 How Deep Can Sperm Whales Dive?
05:36 What Animal Can Dive the Deepest?
06:10 Can Whales Get the Bends?
06:55 Call to Action

This was one of my earliest videos, back when the channel was still called Wine & Wins. I've revisited this topic in my latest video with more information and improved quality:    • Under Pressure: How Whales Conquer CR...  

Now everyone knows that animals like seals and sea otters can stay underwater for exceptional amounts of time… but not everyone knows about their unique adaptations that make this possible. So today we’re taking our deepest dive yet… into how and why marine mammals dive so deep.

The deepest diving human was Herbert Nitsch who held his breath for four minutes while diving to a depth of 214 meters. Unfortunately, he suffered from severe decompression sickness afterwards and required extensive rehabilitation just to walk again.

Elephant seals are some of the deepest diving animals on the planet. They mostly feed on benthic fish, like skates and rays, that live on the ocean floor. So these seals will dive up 5,000 feet in search of food! That’s nearly a mile underwater. And they’ll do it by holding their breath for an hour and a half. All pinnipeds, like seals and sea lions, have several unique adaptations that make extreme dives like this possible. They can also slow their heart rate from 100 beats a minute to just 3 or 4 beats per minute during deeper dives. Another is the position of their nostrils… it is closed. Meaning they have to flex to open their noses to take a breath.

Sperm whales and Cuvier's beaked whales are extreme divers. Sperm whales dive to about 3,280 feet where they feed on giant squid and octopus. And Cuvier’s beaked whale is the deepest diver in the sea. They’ve been recorded reaching depths of 3000 meters. That’s almost two full miles underneath the ocean! And they did it by holding their breath for over three hours.

Why do marine mammals grow to be so big? I answer that question here:    • Why Are Marine Mammals So BIG!?  

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MUSIC
Scott Buckley
www.scottbuckley.com.au

THUMBNAIL IMAGERY
Janos stock.adobe.com
Text other alterations by DoubleAgent XV

ADDITIONAL PHOTOGRAPHY
italo stock adobe.com
Светлана Наклейщиков stock.adobe.com
vchalup stock.adobe.com
Katharine Moore stock.adobe.com
mzphoto11 stock.adobe.com
kcapaldo stock.adobe.com
Natali Snailcat stock.adobe.com
hooyah808 stock.adobe.com
Bart Kwieciszewski stock.adobe.com
Kalyakan stockadobe.com
ink drop stock.adobe.com
DaiMar stock.adobe.com

Cuvier’s Dolphin Image and Humpback Whale Song
Are public domain because they contain materials that originally came from the U.S. National Oceanic and Atmospheric Administration, taken or made as part of an employee's official duties.

Heart Rate Animation
www.videezy.com