It sounds like you're describing a beautiful painting depicting grey whales, specifically a mother and calf, in the vast and serene expanse of the great blue ocean. The size of the artwork is mentioned as 20" x 30". This imagery evokes a sense of the natural beauty and grace of these majestic creatures in their ocean habitat. The ease with which the painting flowed from you suggests a deep connection and inspiration drawn from the subject matter. Art that captures the wonders of the ocean and its inhabitants often resonates with a sense of awe and appreciation for the marine world.