Sea cucumbers have lived for hundreds of millions of years and never imagined that they would experience such a shameful thing in this era.
The species that does this to sea cucumbers is the pufferfish, which has the habit of hiding inside the cloaca of sea cucumbers, hence its name.
The pufferfish is a small, flat fish that lives in the ocean and is about 30 centimeters long.
In the perilous ocean, these small fish, lacking any real strength, are basically only good for being food when they encounter other species.
Therefore, a safe haven is quite important for the hidden fish.
Sea cucumbers are one of the few species that breathe through their rear ends.
When sea cucumbers breathe, their anus opens and closes, drawing in fresh seawater and absorbing oxygen from it. The remaining seawater is then expelled through the anus.
This gives the hidden fish an opportunity. They usually wait quietly at the anus of the sea cucumber. When the sea cucumber breathes and its anus opens wide, they swarm in and burrow into the sea cucumber's body.
Hidden fish that find big houses sometimes show off to each other, so they invite their relatives and friends, as well as distant relatives, to come and have a party.
Because sea cucumbers are much larger than wrasses, these relatives could very well make their homes inside them as well.
According to statistics, up to 15 pufferfish can live inside a single sea cucumber.
In other words, the sea cucumber's rear end is like a villa where a large family can live together, according to the hidden fish.
Sea cucumbers may not like the feeling of having their anus drilled, but they can't stop breathing, so compared to suffocating, having their anus drilled is obviously nothing.
Of course, not all sea cucumbers are willing to let the pufferfish crawl in and out of their anus. Some sea cucumbers grow teeth in their anus and bite the pufferfish to death when they enter.
Just as there are good and bad people, there are also bad fish.
Some sea cucumbers are quite wicked; when there is no food source, they will eat the internal organs and gonads of sea cucumbers, making them utterly ungrateful.
Some of the hidden fish are better; they go out to forage during the day and then burrow into the sea cucumber's body to sleep at night. They never eat the grass near their nest and do not disturb the sea cucumber's life. They are quite conscientious.
For the pufferfish, burrowing into the anus of a sea cucumber is instinctive; their size and characteristics dictate that they need to defend themselves in this way.
They don't just target sea cucumbers; any animal with an internal cavity will become their target.
But after all, neither shrimp, crabs, nor other fish have the same safe and convenient way of getting in and out as a sea cucumber's anus.
Moreover, sea cucumbers are large, move slowly, have few natural enemies, and are not easily discovered when hidden on the seabed, which is why they have become a natural sanctuary for sea cucumbers.
That's why they say no sea cucumber can escape the "fate" of having its anus drilled into it!
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