Submarine Ghost Demon Concept Designs

Prompt:

Concept designs for an submarine ghost like figure with a tentacled approach demon latched onto its head and expanded jelly-like whips that flow lazily but gracefully at its sides like a jellyfish while it floats around aimlessly zapping fish that get too close it can usually be found searching for lost shiny trinkets and typically hides amongst coral and is found near shipwrecks, this character has cryokinesis and umbrakinesis and electrokinesis and is for the next bioshock video game in the franchise underwater with inspiration from the franchise bloodborne and the mind flayer from stranger things on netflix in the style of a fluffy muppet