A colossal living island megacity shaped like a sleeping mountain-sized leviathan whale, massive bone-white structures growing from its back forming terraced neighborhoods, huge biological solar panels embedded in skin-like membranes catching sunrise light, sleek bio-submarines swimming in circles around the creature's body, tiny marine-architects walking on illuminated deck platforms atop the leviathan's back, soft ivory and deep ocean blue palette with warm sunrise glow filtering through misty vapor, epic top-down drone view from above emphasizes impossible bio-architectural integration, photorealistic, cinematic depth of field