My son had a beach wedding and asked me to make the cakes.  He wanted the traditional chocolate with chocolate covered strawberries, but, the bride wanted something elegant with a beach flare.  I made chocolate seashells in several shades and made "coral" using royal icing.  The table was decorated with organza with sea glass and seashells scattered around.  I illuminated the cakes using glass stands with battery powered votive candles in the bases.  The bride, and guests, were thrilled.