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These conjoined twin gray whales found washed up in a lagoon could be the first of their kind ever discovered.

The Siamese pair were spotted by a group of scientists in Mexico's Laguna Ojo de Liebre, or Scammon's Lagoon.

Scientists suspect the calves were miscarried because the carcass was only seven feet long, compared to the normal newborn gray whale size of 12 to 16 feet, reports outdoor sports website grindtv.com.

Conjoined twins have occurred in other species including fin, sei and minke whales.

But an online search, plus a search of the Natural History Museum of Los Angeles database, did not reveal any records of this type.

(Image: Getty)

It is unknown whether the mother survived the birth.

It's not the first two-headed animal to be discovered recently. A piglet was born with conjoined heads and had two noses, two mouths and three eyes.

He was among a litter of 10 piglets born recently in Nanchang, the capital of eastern China's Jiangxi Province.