Mermaids nearing the shore

I am trying to put together drawings and audio to make a video but got distracted by what exactly do I want the mermaids to look like? They are pretty angry, well, the ones I'm talking about are. I won't be using this particular sketch but I did sort of scare myself doing it. I keep thinking about crabs and dead man's fingers. I used to dream of a green, treacle sea when I was small...with things gliding under the surface.
Now I dream about medieval towns and a garden in the snow on top of a mountain. Go figure, as they say.