A close-up image of an octopus underwater, with a clear view of its three hearts

A close-up image of an octopus underwater, with a clear view of its three hearts glowing softly inside its semi-translucent body. The octopus's veins are highlighted in a bright blue, showing the flow of its copper-rich blood. The ocean water around is deep and dark, with faint rays of light penetrating from above. The octopus's eyes are large and curious, reflecting the deep sea environment. Small fish and coral can be seen in the background, adding depth to the scene.