shells

"These conditions make it difficult for some marine organisms to build and maintain their shells and can even affect fish."

And most seagrass is found in tropical waters, which contain an abundance of carbonate, the compound in coral and mussel shells.

By the time she returned for a second visit, the zoo had implemented a five-minute limit for spectators, after some were caught tossing water and shells to try and rouse Moo Deng.

He added that tear gas shells and plastic bullets were fired to disperse the crowds.

Because the resin reabsorbs into leaves as they cool, the researchers squeezed the leaves over two large shells while still hot.