Week 1, Lost at sea

Here is Guybrush versus the fishy bitches,
Those saline blooded sea pony witches.
They drown the luckless and the weary,
With their song so strange and eerie.
Our little pirate has come prepared,
She stands ready, her sword bared.
But she looks for them on the wrong side,
As from the other they do deride.
Will our hero run them through,
Or will she become a fishy stew?