Two-Headed Porpoise Found For First Time

Two-Headed Porpoise Found For First Time

The breeding male newborn porpoises were caught as bycatch and dumped into the North Sea by Dutch fishermen fearing it is illegal to keep them.

The first known case of a two-headed porpoise was documented last month when Dutch fishermen in the North Sea accidentally caught an abnormal creature as incidental catch in a raid nets.

Fearing that it is illegal to keep the marine mammal dead, they threw it into the ocean, but not before taking pictures of their strange research and alert researchers.

While the Siamese twin case studies have been studied in humans, reptiles and companion animals, they are rarely seen in wild mammals. In fact, prior to this finding, only nine cases of cetaceans in both directions of any type have been documented reliably.
A recent study published by the Journal of the Museum of Natural History in Rotterdam contextualizes the scarcity of discoveries.

“Binocular descriptions of whales and dolphins are extremely rare,” said Erwin Kompanje, the National Museum of History in Rotterdam, in his study. “We knew nine [other] published cases.”

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Although researchers have lamented not being able to physically examine the dolphin they could gather data on the fisherman’s photos.

Scientists definitely know that the dolphin was both a newborn and a man.

The dorsal fins did not rise, the grandstands (or top of the head) still contain the hair and still contains an umbilical opening, indicating that the dolphin died shortly after birth. The story had not been rigid, necessary development porpoises have to swim.

On average, porpoises produce offspring every one or two years, and even if twins are extremely rare. Nearly 700,000 Marsopas are found worldwide, with 345,000 residents in the North Sea, but never before with two heads (until scientists can determine).

The International Union for Conservation of Nature says that bycatch is the biggest threat to porpoises. As a result, the EU has taken measures to control the impact of trawls and on populations.

It is believed that binoculars symmetrical ensemble, resulting in porpoises when two different embryos fuse or a zygote is only partially divided.

Kompanje noted in his study, however, a complete understanding of what causes twins together remains an enigma.