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.
FLORIDA BEACH DWELLER (https://www.pinterest.com/floridabeachdw/whimsical-florida/): Oyster shell escort cards with calligraphy by Laura Hooper for a Captiva Island Wedding. Photo by hunterryanphoto.com
Nautical Place Cards, Escort Cards, Food Labels - PRINTABLE file - Nautical Wedding, navy and gold or any colors - Keira