This full-page adults-only coloring page features a large blue octopus, its eight tentacles stretching outward gracefully. The octopus has a large body and deep black eyes, with several smaller fish swimming around it in the sea. The background is in shades of light blue-green and dark blue, which gives the page an air of depth and mystery. For a whimsical look, try coloring the octopus in shades of deep blues, purples, and greens. For a more realistic look, use lighter shades of blues and browns that capture its real-life hue. The surrounding sea creatures can be colored with bright greens, oranges, and blues, making the ocean come alive in your finished piece.