"The sea hath its pearls" is an 1897 oil painting by British figurative painter William Henry Margetson (1861-1940).
The circlet of crabs carved in low relief on the frame of this painting is integral to its success as a work of art.
Echoing the seaside theme, and offering closure to an otherwise excessively open composition, the frame participates in the painting quite as constructively as the bending figure and wave-lapped beach.