Please put crab shells on this plate.
The kanji and the word are exactly the same. That means they share meanings as well.
Since this word is made up of a single kanji, it probably uses the kun'yomi reading. You did not learn this reading, so here's a mnemonic to help you:
Shells come from (から) living animals. You can't have a shell unless something was once in there. They have to come from something.