To create a home that makes you feel as though you just dove into the ocean, hang up a tapestry, add coral reefs and deep sea fish, and feature oceanic . If you don’t want all that blue in your room, you might just have plain walls and then decorate with starfish decor to show off your oceanic, deep blue sea and make a beautiful under-the-sea place. Featuring oceanic life is a perfect way to make, design an underwater themed interior and highlight the natural beauty of the deep blue sea.