The tooth of an archosaur, left, which was a direct ancestor of many dinosaurs, and the complete skeleton, including soft tissue of a horseshoe crab, right.

左图，是古蜥蜴的牙齿，它是很多恐龙的直系祖先；右图，是一个完整的马蹄蟹的头盖骨。

youdao

Its abdomen is soft, so a hermit crab USES the empty shell of a sea snail to protect itself.

它的腹部是软的，所以寄居蟹用一个空的海洋蜗牛的壳来保护自己。

youdao

Start with the spicy fried soft shell crab and juicy morsels of grilled beef wrapped in betel leaves.

BBC: Cheap ethnic eats in London

Hello to the gorgeous soft shelled crab crisped in olive oil, served with melon and prosciutto along with a silky dollop of house made Greek lemon yogurt.

FORBES: Fine Dining At New York City's Ai Fiori

When soft-shell crab is in season, we've served a whole fried one with Thai influences.

WSJ: Endless-Summer Baked Blue Crab