Mermaids LOVE shoes.
Many of the materials present in footwear can withstand deep sea pressure, hence why human remains in sunken ships disappear but the shoes don’t.
When fishing up an old boot, check inside for valuables, as a mermaid may have been using it as a bag.
In multiple mermaid languages, the words for “bag” and “footwear” are interchangeable. In a sense, it’s poetic, as footwear is needed to “carry” yourself on land.
Helping send out messages across the seven seas.