Beach Theme Centerpieces with Floating Candles Beach Theme Wedding Centerpieces with floating Candles are simple but really effective. It has been choices when it comes to formal event decoration. It is one of the most desirable and romantic wedding venues. Here simple Ideas for Sea Theme Centerpieces with Floating Candles. This is too cute for a beach wedding. Fill the glass with sand and seashells; this is another great way to save money as opposed to using flowers! Seashells in the centerpiece with petals as an accent on the table. Love it.