Blue Coral Seashell Sand Wedding Centerpiece by CeShoreTreasures, $75.00/ 6 in strofoam ring glued to clear vase, blue satin ribbon and blue acrylic bubble garland[could use blue string pearls] around glued to Styrofoam ring, glitter paint coral and beach grass, blue sand and white starfish, pretty!
Instead of numbers to assign guests their tables, use names of seashells. Each type of shell represents a different table. Arrange seating cards and shells on aqua fabric to give the impression of water. On each table, display a card with the shell's name, or fill a bowl with those shells as a centerpiece.