cuddle fish, Subnautica game, aquatic pet, playful behavior, small size, expressive eyes, grey body, white spots, flipper movements, underwater, coral reef, bioluminescent plants, sea grass, bubbles, clear water, ambient ocean light, close-up shot, detailed texture, realistic, vibrant colors, 3/4 view, dynamic pose, friendly interaction, marine environment, soft lighting, high-resolution, detailed scales, side fins, gentle touch, player character, underwater adventure, exploration theme.