Blurred blurry background of a beach with a surfboard and a surfboard

two imposing 15 meter figures, Their bodies were elegant and powerful, curving perfectly from a broad-shouldered torso to a powerful waist-length finned tail. They looked like a human fused with a dolphin, but more robust. One of their skins was a mesmerizing grayish blue., almost metallic, with faint bioluminescent markings that flickered like underwater constellations, while the other had gray skin without any marks. On top of their heads, a single vent. Big, intelligent eyes, adapted to the depths of the ocean, peek from a wide, rounded face. Their noses were small and flat, with wide nostrils positioned high. Full lips suggest complex vocalizations. His arms were strong and muscular, with webbed fingers perfect for navigating the water. Forget human legs – a powerful horizontally flattened tail takes their place, pulsing with enough force to propel them effortlessly across the ocean.