Underwater fantasy creature, mermaid-like face with fin-like protrusions

Underwater fantasy creature, mermaid-like face with fin-like protrusions, iridescent blue skin, looking up in wonder, bioluminescent particles, rays of light piercing through water, small fish swimming around, vivid colors, hyper-detailed CGI, cinematic lighting, ultra HD, Avatar-inspired --ar 16:9 --q 2