I am actually kind of surprised at myself for making this since I haven't really produced anything all that good in months. My tablet has the power to make my crappy sketches not so crap.
Sirens appear to many men as attractive women, luring them off the sides of boats with their silky voices and glowing esca eyes, but once in their clutches, the Sirens sink their needle-like teeth into them, devouring them in only a few minutes. From the torso down, their bodies are fish-like but twisted with crooked fins. The skin tone of Sirens vary greatly from where they have come from (dark blue or even black for ocean, blue-green for being closer inland and even a white-blue for those who come from ponds etc.). Many sailors now know of the dangers of Sirens and how to steer clear of them, so Sirens mainly resort to land to get their feedings. The myth is that if a Siren goes without devouring the soul of a man for a whole month, that she will grow old and decrepit, thus sustaining their youth and beauty with the more men they kill. Using the power of spells, they can have legs for up to 24 hours but they find it incredibly difficult to walk.
This Siren design belongs to yours truly along with all the groovy explanation I did :3