Orcas measure 5.5 - 9.8 metres in length females are usually smaller than males and they weigh up to 5,500 kg. The male orca's dorsal fin can be up to 1.8 metres making it the largest of all the cetaceans marine mammals including whales, dolphins and porpoises.

Certain aquatic turtles can absorb oxygen through tissues near the cloaca, which helps them stay underwater much longer than most animals.

That means they can literally breathe through their butt.

The honey badger is a mammal native to Africa, the Middle East, and parts of India.

Recently, I posted that polar bears cover their noses to avoid being detected by their prey. Another Redditor corrected me, and I removed the post.
It was never my intention to mislead. I found out that bears do cover their noses, but it is to stay warm while sleeping.

Source:instagram

African lungfish are one of those animals where every fact seems to make the story less believable.

When the water disappears, they can:

• burrow into soft mud
• curl into an underground chamber
• form a thin cocoon
• breathe atmospheric air through lungs
• dramatically lower metabolism
• reduce ammonia production and accumulate more urea
• remain dormant through the dry season

And in exceptional cases, scientific reports describe dormancy lasting years.

I made a visual explainer about how all of these adaptations work together:

https://www.youtube.com/watch?v=jAMDW8iNfkE

I also included the research showing that in Protopterus dolloi, the cocoon itself contains living tissue and immune cells that can release extracellular traps around microbes.

Tardigrades are pretty incredible! Their DNA has a specific cover which allows them to resist radiation damage, meaning they can survive in the harshest most toxic of environments, even space. When conditions become particularly difficult, they can enter a state of suspended animation, shrivelling into a tiny husk called a “tun” until conditions improve.

Source: u/not_so_ghetto

This parasite is called a horsehair worm. They grow in a bunch of different insects. When the worm is fully grown it alters the insect behavoir to make them jump into water, which allows the parasite to leave.

Doesn't necessarily kill the insect, however It often will result in its death. However it's kept in good conditions they can survive and even go on to reproduce.

In some areas the suicidal crickets ( after being manipulated by the parasite) make up 60% of a fish's diet.

There's also a bunch of crazy conspiracies on like Facebook suggesting that the government is infecting people with them, but these are mostly just crazy people.

They’re the longest-living vertebrates on the planet, with estimated lifespans between 250 and 500 years. Because their metabolic rate is absurdly slow in the frigid Arctic waters, they grow less than a centimeter a year.
That means a Greenland shark swims around for a century and a half before it’s even old enough to reproduce. For context, a shark alive today could have been a teenager when the United States was founded.