Seashell Bra/Playing With

Basic Trope: Mermaids use ocean objects, plants, animals, etc. to cover their breasts.
 * Straight: Marina's bra or bikini top are made of shells.
 * Exaggerated:
 * The "fishy" part go down to Marina's bustline, it functions as a strapless dress.
 * Even the pre-teen mermaids that have no boobs cover their chests, too.
 * Downplayed: Marina just wears a fancy pearl necklace.
 * Justified:
 * Even in the merfolk society, breasts are considered as "private", hence why they're covered.
 * Just a fashion statement.
 * Inverted: Marina is topless, only covered by her long hair or pearl necklace.
 * Subverted:
 * Marina is apparently to be topless.
 * Her top is made of fabric.
 * It's later shown that in mer-society, they see clothing as optional.
 * Double Subverted:
 * Since many mermaids have high taste in fashion to the point of using some form of brassiere.
 * Mermaids reject clothing during the film... but end adopting
 * Parodied:
 * Mermaids use shells as brassieres... even from animals that are still alive, or shells whose shape are not apprpriate for breat covering,
 * Zig Zagged: It's a common fabric top, though it has a seashell pattern.
 * Averted: ???
 * Enforced: ???
 * Lampshaded: ???
 * Invoked: ???
 * Exploited: ???
 * Defied: ???
 * Discussed: ???
 * Conversed: "They can't have mermaids being topless on TV! Think of the Children!!"