What is it? Rare 'alien fish' caught in Mexico

A strange-looking creature dubbed an 'alien fish' has been found off the coast of Cabo in Mexico.

The pink creature was caught by a client of Jaime Rendon, captain of Dr Pescado, while fishing in the Cabo corridor at El Tule.

Pictures were uploaded to the Pisces Sportfishing Fleet Facebook page.

The original post read: "ALIEN FISH IN CABO? Jaime Rendon is the well known and liked local captain of the panga Dr. Pescado; he is also a great fisherman - we don't have all the details yet, but know that he caught this strange creature off of Cabo today.

"It appears to be some kind of shark. He realised it was something special and RELEASED it him/her back into the sea.

"Well done Jaime - very few people would have done that. Photos have been sent to local experts to try and find out what it is. If anybody has any ideas please let us know."

The team then shared more pictures and information, saying that researchers had identified the creature as an albino swell shark. Jamie said of the catch: "I was really surprised but what caused most impact were the eyes, so strange". He thought it looked like an alien but guessed it was some kind of shark as it had raspy skin, three rows of tiny teeth and three gill slits on each side of the head.

The swell shark gets its name from its ability to expand its body to about double its regular size to prevent its predators, such as seals and larger sharks, from pulling it out from rocky reefs, under ledges, and in crevices.