Barnacles that live near shore breaks often develop thicker, heartier manparts to survive the crash of oncoming waves.ġ2. The filament-like penis extending from its shell has an exoskeleton with "accordion-like folds" that stretch out to inseminate nearby females. Though they don't appear to do much more than stick to the underside of boats, barnacles actually possess one of the longest penises in the world - at least relative to their body size. New research suggests that without the extra weight bogging them down, the new eunuchs become "superior fighters," with enhanced endurance that gives them a better shot at surviving. Having penis-detached intercourse allows the male spiders to not only escape the hungry female - who successfully eats the male 75 percent of the time - but also gives them a better chance of fending off competing males. Male orb spiders detach their penis and insert them in female spiders to impregnate them, says Jennifer Welsh at LiveScience. Studies suggest that going halfsies may make the individual sperm swim faster. Getting all four of these into a female is impossible when fully engorged, so the echidna only insert two at any given time. Scientists, however, have long been perplexed by the male anteater's mysterious sex organ, which secretes semen from four different heads. Like its cousin the platypus, echidna females lay eggs instead of giving birth like other mammals. The echidna, also known as the spiny anteater, is native to Australia and New Guinea. This leaves "gaping, seeping wounds" in female pirate bugs, who often die shortly after giving birth. The tiny 3mm (0.11 inch) creature also practices one of the animal kingdom's most dangerous copulation methods: Its spiny penis is razor-sharp, and instead of inseminating females by traditional means, the bug uses its sex organ to violently stab through her exoskeleton in order to ejaculate. The warehouse pirate bug is typically used to guard grain storage warehouses, where it chows down on threatening moths and larvae. The warehouse pirate bug's dagger-like shaft More specifically, the reproductive organ shoots out from just under the fish's throat, giving the fish the unique ability to grab onto a female with its mouth while fertilizing her eggs at the same time.Ħ. Phallostethus culling's penis sprouts, oddly enough, out of its head. But that's not the case for a newly discovered species of river fish identified in Vietnam's Mekong Delta. Most animals have their reproductive organs located close to their tail-ends. "Conversely, the long penis could be the reason the females try to escape." (The bird is only 16 inches tall.) Females are often observed trying to fly away from an eager mate, leading experts to believe that the long penis could be an evolutionary response that makes forced copulation easier. The duck's penis is shaped like a corkscrew and can extend to more than 17 inches. But a few, such as the Argentine lake duck, more than make up for it, says Miss Cellania at Mental Floss. The Argentine bluebird duck's long corkscrew It's definitely an "unpleasant looking genital barb," says Ian Chant at Geekosystem, but "when they're trying to break through the tissue that blocks their mates' genital pores, male mosquitofish are probably less than concerned with winning any beauty contests."Ĥ. North Carolina State University Researchers found a reproductive shaft equipped with four sharp hooks, which males use to grab onto resistant females during mating. Yet the newly discovered llanos mosquitofish ( Gambusia quadruncus) is in possession of some of the most "fearsome" genitalia on the planet, says Megan Gannon at LiveScience. Within 24 hours, the slugs regenerate the penises and are ready to do it all over again.Īt first glance, this unremarkable freshwater-dweller from Mexico looks harmless. Once the slugs complete copulation, they " crawl away with their elongated penises still dangling," and then the organs suddenly sever from their bodies and float away. Sea slugs are "simultaneous hermaphrodites," meaning they possess both male and female genitals and use both during intercourse. But what makes this soft-bodied marine mollusk particularly different is its ability to grow a new penis within 24 hours. The Chromodoris reticulata sea slug has the peculiar ability to discard its penis after copulation. The sea slug's disposable, regenerating penis
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