The Sirens or Mermaids were odd looking creatures who had features of a bird from the waist down and a body of a woman from the waist up. The Sirens were thought to be three in number, but that is not certain. In the Greek mythology sirens were the daughters of river god Achelous who lived on the island of SirenumScopuli, Antemusia Islands, Plorum cape or Capreae mountains, but they were not viewed as deities. In some myths they were created to be the playmates of young Persephone (daughter of Zeus, Goddess of Springtime), but were created in to monsters by her mother Demeter after Persephone was abducted by Hades.
In the written text that survived to this day we have information of many names of those daughters, with most famous being Parthenope (maiden face), Ligea (shrill) and Leucosia (white being). Other less common sirens were Aglaope (beautiful face), Aglaophonos (beautiful voice),Molpe (music), Raidne (improvement), Teles (perfect), and Thelxepeia (soothing words). Greek literature mentioned sirens on many occasions most notably in Euripides' "Helen" (where anguished Helen called the help of "Winged maidens, daughters of the Earth") and Homer's Odyssey (where Odysseus and his crew were enchanted by the sirens song, until they regained their minds with the help of Orpheus' music).
It is said that the Sirens induced by Hera competed with the Muses in a singing contest and lost. The Muses plucked the Sirens of their feathers and wore them as a trophy. With their feathers plucked the Sirens were no longer able to fly and, banished to the sea turned half of their body into a fish tail.