Blue sharks are among a few species of shark that are viviparous, giving birth to live young as opposed to laying eggs.
"My first thought was that if something happens to the mother at least the babies will live," Carrillo told Diario Sur.
Positioning the shark on its side, Carrillo then applied a pressure to its stomach with his hand until out popped a baby shark. Then another. And another after that. All told, he helped deliver ten little blue sharks that he said all appeared to be in perfect health.
"They were beautiful little sharks which came out full of life and swam back towards the sea," said Carrillo.
Soon after, two Civil Guards which had been dispatched to the beach arrived to help pull the new mother back out to sea to join her offspring. Carrillo noted that the shark appeared stronger having finished giving birth -- with a bit of help -- and was able eventually able to swim away on her own.
"I'll never forget this amazing experience," he says.