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VIDEO: Diver Finds One Of The Ocean’s Rarest Shark Eggs 

Nurse shark’s egg will grow to become a 10-foot long bottom-dweller.

A fisherman has discovered a rare shark egg floating in the Atlantic Ocean off the Brazilian Coast, the second such find in the past month.

Erivaldo Alves Silva posted video of his find in the waters off the Fernando de Noronha archipelago, 220 miles from the Brazilian coast.

Silva was diving to catch octopus on Sept. 14 when he came across the unusual specimen, which he did not recognize right away.

His footage shows what appears to be an orange-colored pouch floating on the water.

“I have never seen such a thing in my life,” he said. “At first I thought it was weird, but I didn’t think it was that weird.

“Only after I posted it [online] did people say it was a rare find. A shark egg, according to biologists, is very rare.”

Silva says he left his rare find in the sea.

His sighting was the second shark egg found in the waters off Fernando de Noronha in less than a month.

The shark egg found in Atlantic Ocean in Fernando de Noronha, Brazil, by a surfer/fisherman. (Nego Noronha/Zenger)

The egg belongs to a nurse shark, said fisheries engineer Leo Veras, a species listed as vulnerable on the International Union for the Conservation of Nature’s Red List of Endangered Species because of threats from human intrusions and disturbances. Recreation and both commercial and residential development have threatened the sharks’ habitat.

Nurse sharks are about a foot long at birth but can grow to more than 10 feet long.

Unlike some of their speedier counterparts, nurse sharks are slow and sedentary. Despite that, the nocturnal bottom-dweller ranks fourth in documented shark bites on humans.

This “mermaid’s purse,” photographed June 1, 2008 off the coast of Italy, is an example of the empty egg cases that sharks, rays and skates leave behind after they hatch. Beachcombers often find them washed ashore at the point of the highest tide. (Mayastar/Flickr/CC2.0)

The species reproduces every two years, Veras said. Each pregnancy can result in 20 to 30 offspring.

Nurse sharks are one of the relatively few sharks species that lay eggs; most give birth to live young the way mammals do. Shark eggs hatch while still inside the female, and are then expelled in a pouch, colloquially known as a mermaid’s purse, made of collagen protein strands. beachcombers can find the pouches, often with tendrils twirling from one end.

The waters where the eggs were found are part of the Fernando de Noronha Marine National Park, which is administered by the Chico Mendes Institute for Biodiversity Conservation, the administrative arm of the Brazilian Ministry of the Environment.

Edited by Matthew B. Hall and Kristen Butler