Valuable
There's a shellfish, but it's got some kind of fancy headgear. Is that… a crown, perhaps? It looks really valuable — and the shellfish wearing it must be even more valuable to be worthy of such a status symbol!
Alternatively, you can remember this radical with its components: in the middle of the ground, there's a shellfish. Why? 'Cause it's super valuable. The safest place to keep a valuable shellfish is buried in the middle of the ground.