
Majoid crabs
Majoid crabs—known as decorator crabs—are well-known among marine scientists for adorning their surface with items secured from their surroundings. About 75 percent of majoid crab species are notorious for decorating with sponges, algae and other marine debris.Dec
Source: sixtyandme dot com
For the younger generation, it's what they do now.
When the parent decides it's nice to do, too, not unusually it's an occasion for a design that's faith based.
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cc
@Waiting on him The parental generation doesn't necessarily do it when the younger generation does it, though.