Implicating sand_dollar → sea_urchin
Link to implication
Reason:
"The term sand dollar (also known as a sea cookie or snapper biscuit in New Zealand, or pansy shell in South Africa) refers to species of extremely flattened, burrowing sea urchins belonging to the order Clypeasteroida."
https://en.wikipedia.org/wiki/Sand_dollar
EDIT: The tag implication sand_dollar -> sea_urchin (forum #262918) has been rejected by @NotMeNotYou.
Updated by auto moderator