Mersquid

The Mersquid appeared in 2011 video game called Alice Madness Returns. The Mersquid is a broken part of the bow of a ship with a demonic Mermaid carved into it. It has four anchors that act as her tentacles, and swims around in a squid like manner, all the while attacking Alice. It is said that they would bring down ships and sailors with their siren songs, and collect their chains and anchors to become stronger.

Expertly crafted figureheads, mute but proud emblems that once graced a great ship's prow, are furious with their sunken fate. Rather than suffer in silence, they wail their own "siren" songs and bring down other ships with the anchors, chains, and other ballast they've collected.