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Inside the opulent Grand Palais, guests wandered into a pristine white sea bed with giant shells, sea horses and seaweed that sprawled up towards a glimmering shower curtain.
The collection was also marine-inspired.
But in lieu of sailor stripes or anchor motifs, it was far more subtle - the theme played on sunlight on the surface of the ocean.
"I absolutely wanted to avoid mermaids and things like that," Karl said backstage, wearing a seashell pink shirt and matching tie.
"I was inspired by the movement of seaweed, its lightness, and by certain fish that have very modern shapes, like sting rays."
Models emerged from a giant sea anemone onto the pure white catwalk clad in metallic fabrics shot with fiberglass and even paper in the form of cocktail dresses and variations of the label's iconic skirt suits.