Mermaids were in some cultures treated as sirens, for example in Scandinavia and Germany. The sirens were depicted with white hair. Such creatures were known to love to sit on the rocks and sing their songs to attract the sailing by people. When the sailors came close to them, they mortified them. According to some cultures mermaids have always been a bad sign, and to see them was unlucky. Sometimes mermaid tattoo designs can symbolize upcoming dangers, or other bad things that have still to come. However, mermaid tattoos remain very popular nowadays because they are looking pretty good in and mermaid tattoo design.