January 24, 2021


Aim for Excellence

These 5 Decidedly Weird Animal Butts Are The Distraction We All Need Right Now

The 2019 discovery of a comb jellyfish with a disappearing butt experienced us wanting to...

The 2019 discovery of a comb jellyfish with a disappearing butt experienced us wanting to know: what other types of bizarre animal behinds are manufacturing floaters (or sinkers) out in the entire world?


From wriggling deep sea worms that poop from their mouths, to flatworms that have myriad butt holes on their backs, evolution has concocted a strange and smelly vary of squander elimination methods. 

one. The fully butt-fewer

A single of the most extraordinary pooping approaches has to be not bothering to poop at all. One animal that does this lives on your confront.

Face mites, these types of as Demodex folliculorum, do not have an anus at all. They really don’t even poop by way of their mouths like our ancient ancestors did. All the squander they create from munching on your pores and skin and sebum receives stuffed into their large gut cells, which might explain why they only live up to sixteen days.

Their squander is launched on to your confront once they die and disintegrate, alongside with bacteria that may cause pores and skin swelling termed rosacea in some individuals.

(santoshpath/Flickr/CC BY 2.)

2. Multi-gifted poop-chutes

From wombat butts sculpting cube-shaped poops and fish that poop out our seashore sand, to turtles that can breathe by way of their anuses, there confident are some gifted arses out there. But the most majestic of these talents possibly belongs to the generous behinds of manatees (Trichechus), who get swimming guidance from their own farts.

The cellulose-loaded seagrass eating plans of manatees make large quantities of methane, which they retail outlet in the folds of their large intestines. This offers manatees floating power when expected, but when they need to have to sink, scientists suspect the animals squeeze this gaseous squander by way of their intestines and out of their bottoms.


Manatees are well recognised for their gassy habits. Observations of manatees in captivity have revealed constipation can avert them from remaining ready to dive, even though laxatives allow for them to regain this means.

So, it appears flatulent bums allow for manatees to regulate their buoyancy levels with small hard work.

2. You will find no put like bums

Most of our butts house a multitude of microorganisms, but some anus owners have to tolerate a great deal worse. Sea cucumbers have to endure sixteen-centimetre (six-inch) extended fish wiggling into their bum holes – which double up as respiratory holes, way too.

These eel-like squatters are pearlfish (Echiodon rendahli), and they have picked their hiding spot well, given that sea cucumbers make toxins that scare absent predators.

But pearlfish do not make for polite anal visitors. They’re going to quite fortunately snack on sea cucumber gonads and other organs when they won’t be able to be bothered heading out for dinner, and they resist the sea cucumbers’ foul toxins by oozing a protecting mucal goo all around them selves.

Luckily, sea cucumbers can regrow their organs, because they undoubtedly won’t be able to maintain their butt breath for extended sufficient to continue to keep the pearlfish out of their rectums indefinitely.

4. Anal loss

There is at the very least one creature that can save its personal arse by permitting go of it. This South American scorpion species (Ananteris balzani) has an anus suitable up near the toxic stabby little bit on its tail.

If attacked, the scorpion has the means to fall its tail, a great deal like some lizards can – severing your personal human body aspect in this way is termed an autotomy. Apart from, in contrast to lizards whose anuses are extra sensibly positioned nearer to their hindlegs, these scorpions also fall their butts alongside with their tails, in trade for a bit prolonging their existence.


It is typically only the adult males that will make this sacrifice, as the rate is significant. The moment the tail and butt segments are gone, the wound heals over leaving no opening for their squander to escape.

When it might obtain the scorpions a small extra time to mate, they can never poop yet again. The scorpions will continue to keep hunting (little prey only, because they can no lengthier acquire down a significant meal devoid of their stinger) and stuffing foodstuff into them selves, swelling their abdomens with trapped excrement.

Researchers have observed some of these scorpions lost more segments of their tails when the force of the developed up squander bought way too a great deal.

Finally, these small fellas will undergo demise by gradual interior poop-splosion, as squander fills their innards. Actually, no issue how a great deal extra intercourse they can cram into those people achievable 8 more months, it however sounds like it would be kinder for them to die alongside with their anus.

Ananteris before and after tail cleavage (Thorell 1891/Botero-Trujillo & Flórez 2011)Tail autotomy in Ananteris scorpions. (Mattoni et al., PLOS A single, 2015)

five. Bum power

Bum jokes apart, butts and the poop they exude carry out a very important purpose in sustaining existence on Earth as we know it, not the very least many thanks to recycling vitamins and minerals.

Acquire whales, for occasion. Just as we use cow manure to fertilise our crops, whale excrement fertilises the existence that grows in the sea.


Sperm whales (Physeter macrocephalus) defecate a disgustingly shiny-orange floating plume, and like the whales them selves, their poop plume is ginormous. In reality, marine biologists have dubbed them “poonamis”.

These plumes feed floating plankton, which nourish most of the marine foodstuff chain and photosynthesise carbon dioxide out of the atmosphere.

Experts have estimated this cycle can get rid of 200,000 tonnes of carbon dioxide a calendar year right before industrial whaling greatly diminished whale figures, this hard work was nearer to two million tonnes.

Irrespective of their toilet approaches, these astounding species all display the marvel and power of anuses. The most essential lesson – by and large, it can be far better to have an arsehole than not.

This short article was originally posted in March 2019.