Cr is the chemical symbol for chromium.

I need to check my cr.

The hermit crab changed its shell.

The horseshoe crab is a living fossil that has remained virtually unchanged for millions of years.

The fiddler crab has one claw that is much larger than the other.

I saw a land crab on the beach.

I had to deal with a crab louse infestation.

I picked some ripe crabapples from the tree.

She had a crabbed expression on her face.

She woke up feeling crabby and irritable.