I grabbed a Funky Fossil stamp set that I've not used for some time. It's the "Starfish Wishes" set. Incidentally, on checking their website, I see that this A6 stamp set is reduced in price at the moment to £8.54 so a bargain if you're thinking of getting it.
I used Distress Oxide Inks (Fossilized Amber and Tumbled Glass) through the Funky Fossil "Scenic Borders stencil", repositioning the stencil several times to get an overlap of waves.
I stamped the shell from the "Starfish Wishes" stamp set using "Victorian Velvet" Distress Oxide ink. I then coloured the image using "Tattered Rose" and "Tea Dye" Distress Oxide inks.
I stamped the "Listen to the sea" sentiment using Versafine Clair "Morning Mist" grey ink.