Mermaid Decor. A mermaid is a legendary aquatic creature with the upper body of a woman and the tail of a fish. Mermaids appear in the folklore of many cultures worldwide, and are often associated with sailors. Today, nautical mermaid decor is a popular item for the home, beach cottage or office. Mermaid Decor â€¢ Nautical Beach Home Decor â€¢ California Please note: You are currently browsing img dine for design san diego homegarden lifestyles that is 1260x840px in size. This image is listed in garden decor san diego category. Mermaid Decor Nautical Beach Home Decor California, 1260x840 in 472.13 KB.