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  • These Bizarre Ocean Creatures Suffer From A Birth Defect Known As Parapagus Dicephalus on Random Curious Emergence Of Two-Headed Sharks

    (#2) These Bizarre Ocean Creatures Suffer From A Birth Defect Known As Parapagus Dicephalus

    Dicephalic parapagus is a genetic abnormality you might be familiar with already. The layman’s term for this heartbreaking condition is conjoined twins. You've probably heard of cases where two human heads were attached to the same human body. This is the same thing. However, it should be noted that conjoined twins have also been observed with attached heads. When this happens, it is known as craniopagus parasiticus, a slightly different circumstance. 

    When an animal is stricken with parapagus dicephalus, it is referred to by scientists as a polycephalic animal. Polycephalic animals are few and far between, but their existence dates back millions of years, with the earliest recorded specimen being the fossil of a lizard that is estimated to be over 122 million years old.

  • Thumb of A Two-Headed Embryo Was Discovered In A Catshark - The Type Of Shark That Lays Eggs video

    (#6) A Two-Headed Embryo Was Discovered In A Catshark - The Type Of Shark That Lays Eggs

    While shark tales featuring two-headed creatures have been whispered about from coast to coast for centuries, the Atlantic sawtail catshark made history in October 2016 when it became the first recorded egg-laying shark species to suffer from the syndrome.

    Oviparous sharks like the catshark actually lay eggs that hatch in the open ocean. They are a minority among their kind. 

  • Most Two-Headed Sharks Have Bleak Chances Of Surviving Past Birth on Random Curious Emergence Of Two-Headed Sharks

    (#4) Most Two-Headed Sharks Have Bleak Chances Of Surviving Past Birth

    If the idea of a two-headed shark has you bound to your beach blanket with fear, you can relax. The probability that such an animal would survive to see adulthood is slim to none. In fact, most of them barely make it out of the embryo stage and are seen when captured pregnant sharks are cut open. Upon studying dead two-headed sharks that made it beyond the embryo stage, scientist C. Michael Wagner states that the creatures "likely would not have survived very long had [they] been born naturally." 

    While Hollywood portrays a blood thirsty species with double the teeth and double the stomach, the harsh reality is that two-headed sharks are seriously disadvantaged in the ocean. Per the laws of the wild, these unfortunate sea creatures are much more likely to be gobbled up than you are.

  • Ocean Mutations Might Just Be The Wave Of The Future on Random Curious Emergence Of Two-Headed Sharks

    (#8) Ocean Mutations Might Just Be The Wave Of The Future

    What lies beneath the deep blue sea is anyone’s guess. Its depths have long been polluted, flooded in garbage and toxic waste. It’s estimated that the earth’s oceans are currently contaminated by approximately 5.25 trillion pieces of toxic garbage. Between the deadly debris and the overfishing epidemic, marine life has mutated and the end result is an ocean brimming with three-eyed fish, 350-pound catfish, and, yes, even terrifying two-headed sharks.

    Said mutations could be perceived as advantageous for these maritime species, at least at first glance. Researchers have recently determined that mutant fish are a shocking 8,000 times more resistant to toxic waste when compared to their non-mutated counterparts, making a solid argument for the idea that mutation is leading evolution. While that might be the case for three-eyed fish in the sea, two-headed sharks in the ocean are much less fortunate. Their plight is a nightmare, for humans and sharks alike, as they struggle with swimming and do not seem to have an advantage in survival for being conjoined twins. Scarier still is the fact that this nightmare might just be the wave of the future. 

  • Two-Headed Sharks Face Really Unexpected Challenges, Like Not Being Able To Swim on Random Curious Emergence Of Two-Headed Sharks

    (#7) Two-Headed Sharks Face Really Unexpected Challenges, Like Not Being Able To Swim

    If you thought it couldn’t get any stranger than a shark that lays eggs and hatches two-headed babies, then what would you think of a two-headed baby shark that can’t swim? Having trouble swimming is the least of the worries in the realistic life of a shark who suffers from dicephalic parapagus.

    In addition to the aquatic handicap, two-headed sharks are also born ill-equipped for digesting and are often open targets in the wild. In a place where disguise is a life-saving capability, a shark that has two heads is his own worst enemy. This is just one of the many reasons these captivating creatures don’t survive for very long. 

  • Blue Sharks Seem To Be Most Prone To The Condition on Random Curious Emergence Of Two-Headed Sharks

    (#5) Blue Sharks Seem To Be Most Prone To The Condition

    Of all the two-headed embryos observed within the dwindling shark population, it seems that the blue shark is most prone to this rare type of genetic disorder. The blue shark, named after the indigo hue on its upper body, is a species that is reaching a threatened level. Compared to other sharks, it is actually victimized significantly less by overfishing.

    Many scientists point to its reproduction habits as a possible explanation, particularly since blue sharks give birth to an average of 25 to 50 offspring at a time. Some rare instances of births with more than 100 pups have been recorded.

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Two-headed animals are rare examples, mostly the result of genetic variation. However, in recent years, there have been more and more reports about two-headed sharks around the world. Many marine scientists and biologists have been working hard to find out the reasons for the phenomenon of two-headed sharks, but there is no exact result so far. 

Some theories believe that the most important reason is environmental pollution, and some people think that it is the consequences caused by excessive fishing. The number of two-head sharks has gradually increased. Here the random tool introduced 8 emergences of two-headed sharks around the world.

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