3 sentences

1. 我们去海边捉蟹吧。

   wǒ​men qù hǎi biān zhuō xiè ba.

   Let's go to the beach to catch crabs.

   Source: Dong Chinese Dictionary

2. ‪你知道自己对蟹过敏的吧？

   ‪ nǐ zhī​dào zì​jǐ duì xiè guò​mǐn de ba?

   You know you're allergic to crab, right?

   Source: OpenSubtitles

3. 虾和蟹在古代被称为介类。

   xiā hé xiè zài gǔ​dài bèi chēng​wéi jiè lèi.

   In ancient times, shrimp and crabs were referred to as 'shelled creatures'.

   Source: Dong Chinese Dictionary