A sea monster in the form of conjoined Siamese grey whales has been found in a lagoon in Mexcio.

According to ABC, the sea monster conjoined creature was found dead in Mexico's Ojo de Liebre lagoon in the Baja California peninsula.

Reportedly, the sea monster weighed half a ton and was four-meters plus in size.

Such a discovery is "exceptionally rare, without any precedent," said marine biologist Benito Mermudez. It is currently believed that the sea monster was born as a result of a miscarriage and did not survive for long.

While almost 1,200 grey whales were found and spotted in the region during the 2012-2013 season, this is the first conjoined Siamese grey whale on record.

Other records of conjoined Siamese animals include pigs, cows, and of course, humans.

Check a video of the sea monster creature below:

This is not the first time a whale has been labeled a sea monster by observers.

cently, an alleged monster creature has surfaced in Vietnam, with many scratching their heads due to the claims of how it was found.

According to Japanese new site Karapaia, the monster was dug up in Vietnam rather than found at a beach or near the water.

Despite many being confounded at the monster, most of the observers online are claiming it to be a sea monster, or more precisely, the body of a beached whale.

"If you consider a whale a monster...OK, it's a monster," writes Roberto Berti on YouTube.

"The video... is most likely a recording of a beached, deceased whale being loaded on a trailer for burial," wrtes Preston Phro on Rocket News 24.

"It seems that in Vietnam, whales-dead or alive-are considered harbingers of good luck, and fishermen are always happy to see them in their waters. However, when one of them shows up dead, the fishermen will work together to pull the creatures to shore for entombment."