Slab Creature. Throw a slab, cut out an 8" circle, keep the scraps for extras like; eyes, teeth, tail, etc. Use some plastic grocery bags to hold the center form as you bring up the sides like a taco. Score and slip the top and then use your imagination. Have fun.
The 'smooch' fish, a recently discovered creature in the deepest part of the deepest part of the ocean (deep squared!) and can now be seen in a fantastic book called The Deep—The Extraordinary Creatures of the Abyss by Claire Nouvian