Warning: Mermaids

You're lucky when you see rare aquatic creatures during a dive. What would it be like to see a mermaid?! This is a funny scuba diving design that looks like a warning traffic sign, advising that there might be mermaids in the area.

Warning: Mermaids Classic Round Sticker – This diamond-shaped warning sign design shows the silhouette of a mermaid with text below reading "Warning: Mermaids."