Beacon Transcript – Two-headed sharks may seem either the stuff of nightmares or of science fiction, but according to scientists they are both real and becoming more frequent as Mother Nature is offering new mysteries.
The first noticeable reports of the two-headed sharks first started appearing back in October when people seemed inclined to believe this to be a hoax.
However, the specimen was proven to be real as researchers have now found and examined such a specimen.
They have also determined that the two-headed sharks are either more frequent or people are more aware of them as they have been recently been the target of various studies and research.
Occasional spottings of such unusual specimens are not new as the first reports of two-headed sharks span back all the way to 2008.
Most of the recorded cases were as yet undeveloped embryos or still in the egg. The first such case was registered by a Florida fisherman who found such a specimen in the uterus of a bull shark.
Another two-headed shark embryo was discovered by a fisherman in an Indian Ocean blue shark specimen.
Their more official attestation came more recently after a team of Spanish researchers stumbled across a two-headed embryo in a see-through egg.
The egg came from an oviparous species of sharks, which is known to multiply by laying eggs, with this particular specimen having been found in a laboratory catshark.
Valentin Sans-Coma, the lead researchers of the Spanish laboratory which found the egg and which analyzes sharks in relation to human health, declares that the cause of the mutation is difficult to establish.
As the registered cases had previously been few and far in between, an official cause could not be determined. All the team’s findings were published in a Journal of Fish Biology recent edition.
According to the same Sans-Coma, the most probable cause for its appearance amongst the almost 800 other laboratory-grown specimens is a genetic disorder.
The team is unaware of any possible exposure of their specimen to radiation, chemicals or infection, but this would also not explain the other sightings.
As the analysts examined the existing specimens, they determined that the two-headed sharks would most probably not have grown to reach their adult years, that is if they had lived enough to be born.
According to preliminary studies, the most probable species to deliver and produce two-headed sharks is the blue shark, as a female can have almost 50 in a single gestation period.
Scientists tend to believe that the most probable cause for the recent and somewhat more frequent appearance of such two-headed sharks can be linked to overfishing or pollution.
Overfishing could have led to inbreeding and a reduction in the gene pool which could have led to such mutations, just as pollution and the exposure to chemicals could have caused an abnormal development of the embryos.
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