Translation of "Denizkestanesi" in English

Sen hiç Denizkestanesi yedin mi?

Have you ever eaten sea urchin?

Toxopneustes pileolus, dünyanın en zehirli denizkestanesi.

The Toxopneustes pileolus is the world’s most venomous sea urchin.

Elim çarptı, denizkestanesi kaydı, yere düşmesin diye elimle yakaladım,

which I knocked and as it slid I went to grab it to stop it from falling on the floor,