Whimsical Underwater Ocean Pattern with Cute Sea Creatures

whimsical underwater ocean pattern illustration, cute sea creatures scattered across a deep blue seabed: smiling whale, dolphin, sea turtle, narwhal, stingray, octopus, jellyfish, crab, seahorse, tropical fish, starfish, shells, and swaying sea plants, playful hand-drawn shapes, flat vector style, children's book aesthetic, simple rounded forms, pastel and bright candy colors, clean outlines, decorative seamless-pattern feel, evenly distributed composition, top-down graphic layout, soft matte colors, cheerful aquatic scene, crisp digital illustration, high visual clarity, stylized marine life icons