Monday, February 24, 2014

Absurd Creature of the Week: The Pearlfish

This Fish Swims Up a Sea Cucumber’s Butt and Eats Its Gonads

by Matt Simon
(You’re a Sea Cucumber…) You’re breathing through your anus, by the way, and when you take a breath, the pearlfish strikes — squirming up your butt, making itself comfortable in your respiratory organ, and eating your gonads. Or, they’ll go up in pairs and have sex in your body cavity. And that’s when you realize that you must have been a really awful human being in a past life. Like, the type of person who talks on their phone in a movie theater kind of awful.
Such pearlfishes come in a range of species, and don’t necessarily limit themselves to invading sea cucumbers. They’ll also work their way into sea stars, and are so named because they’ve been found dead inside oysters, completely coated in mother-of-pearl. Beautiful, really, though I reckon the pearlfish would beg to differ.
This behavior is the strange product of a housing crisis. You see, shelter is in short supply on many seafloors, particularly those that lack reefs. And there are few better shelters than sea cucumbers, little mobile homes that pearlfishes will enter pretty much as they please, leaving to hunt and returning for protection. If they can’t return to the same one, no worries at all. There’s plenty of decent housing squirming around the seafloor — if you’re willing to live in a sea cucumber’s bum…
(read more: Wired Science)

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