If you didn’t have your daily dose of Fallout, then let us tell you a bit about two-headed sharks. No, we’re not joking, nor are we advertising the trailer for the next Jaws movie.
Apparently, two-headed sharks have been sighted more frequently in International waters. According to the official records, a two-headed shark has been sighted off the coast of Florida and another one in the Indian Ocean.
In addition, the two-headed shark sighted off the coast of Florida seems to have been delivered before its terms. Also, researchers have discovered two conjoined twins sharks in the waters around Mexico. Strangely enough, no instance of an adult two-headed shark has been recorded so far.
Another incident that may be related to the latest sightings comes from marine laboratory situated in Spain. A team of scientists has observed that one shark embryo grew two sets.
To better understand the origin of this mutation, scientists have performed necropsies on each of the two-headed sharks. According to the researchers’ statements, each head of the shark feature a perfectly-formed mouth, two sets of eyes, and a fully-functional brain.
They also had a fully-grown spinal cord, and each head had five gills on each side. Further examinations revealed that the two-headed sharks had two sets of hearts, two stomachs, and, of course, two livers.
Surprisingly enough, although the conjoined twins seemed to have many separate organs, they had to share a single set of intestines, a single kidney, and one reproductive system. At the moment, researchers don’t have enough data to make heads or tails of this puzzle.
While most of them agree that these sightings can hint to a gene aberration, others argue that this may be the work of unknown pathogens. Pollution and overfishing are also taken into account. One scientist explains that overfishing might have shrunk the gene pool up to the point where there is no more genetical diversity.
However, this type of genetic aberration is not endemic to sharks. Scientists from around the globe have identified other species that exhibit this mutation.
The search for two-headed sharks continues, and so does the research. If this aberration was caused by pollution, overfishing, or a viral agent, then there is still hope that we can reverse the condition.
Image source: Pixabay