The death-ball sponge has miniature hooks to trap its prey.

The Nippon Foundation-Nekton Ocean Census/Schmidt Ocean Institute

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Ocean Oddball

Jim McMahon/Mapman®

It lives near the bottom of the globe, more than 2 miles underwater. It’s covered in tiny hooks and rods attached to what look like Ping-Pong balls. Meet the “death-ball” sponge.

Scientists announced the discovery of the mysterious creature last fall. It had been spotted on the floor of the Southern Ocean, near Antarctica. 

“It was just a beautiful thing to see and so unusual,” says Michelle Taylor. She was the chief scientist on the expedition that found the strange sponge. 

Sponges are simple animals that don’t have eyes, a mouth, or organs. Unlike most sponges, the death-ball is a carnivore, feasting on tiny shrimplike creatures. The sponge’s sharp hooks act like Velcro, sticking to prey. The sponge then spends months slowly absorbing the animal into its body and squeezing out all the nutrients. 

“It’s disgusting!” Taylor says. 

Deep-Sea Secrets

Taylor and her team found the sponge during a six-week expedition early last year. They used underwater robots called remote-operated vehicles (ROVs) to collect nearly 2,000 samples. The ROVs also took thousands of pictures and recorded hours of video, which have revealed some stunning results (see “Caught on Camera”). 

The expedition was part of the Ocean Census, a global project devoted to discovering and protecting ocean life. The death-ball sponge is one of 30 new species that researchers have identified so far. But they estimate that about 90 percent of ocean life-forms haven’t been discovered yet. Taylor says it’s magical to find previously unknown deep-sea species.

“If you don’t explore, how will you know?” she says. 

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