Mermaid 2
Rusalki
It seems it would depend on which story you read. However, based on the evidence, you would need to be very careful if you ever encountered one.
In British folklore they can be bringers of bad fortune, capable of causing storms and killing humans.
Some of the bad things that mermaids are accused of include telling sailors their ship is doomed and enchanting sailors and causing shipwrecks. Seeing a mermaid is a sure sign of a violent storm to come. In other stories, they deliberately drag people down in the water and squeeze the life out of drowning men. They also take men down to their underwater kingdoms.
However, on occasions, mermaids can also bring good fortune by giving humans cures or granting them wishes. In some tales, they even marry and live with humans. For example, the Merrow of Ireland and Scotland.
These mermaids are beautiful, gentle, modest and kind. They wear a red cap and, if this is captured and hidden from them, they will shed their skins and stay on land. However, most times they eventually retrieve the cap and return to the sea. They also lure young men to follow them beneath the waves. Here they live in an enchanted state. Merrow music is often heard coming from beneath the waves.
How did this story come about?
Mermaid 6
Old man helping the mermaid
The Lizard in Cornwall is a high plateau surrounded by the sea, with numerous hidden little coves and beaches, just the sort of area for mermaid stories.
Many Cornish people, particularly sailors, have claimed to have seen or heard a mermaid and belief in them was once widespread. There are many stories of mermaids seen on the rocks and of mermaids sitting weeping and wailing on the shore.
The mermaids in Cornish stories possess many of the features of mermaids the world over. They are beautiful, often seen combing their golden hair and live for a long time without ageing. Like many British and Irish mermaids, the mermaid in this story has more sympathy, inquisitiveness and interest in humans than other mermaids.
It was often thought that people with a knowledge of healing or a knowledge of the future gained these powers by supernatural means, either from the witches, fairies or, in this case, a mermaid. This is not the only tale passed down the generations, of special powers given to an ancestor from a mermaid. Preparing a vessel of water, which would show the face of a thief, as in the story, is a common means of detection that occurs in many myths.
Mermaids are one of the most famous mythical creatures, depicted regularly in literature and film. The "Mermaid's Rock" can still be seen off the coast and you can visit Kynance cove and the beaches by the Lizard.