a sleek shark swims gracefully in clear blue water. it has a streamlined, torpedo-

wing whale waters water visible vehicle underwater type tropical torpedoshaped swims subtropical streamlined species sleek sides shark sea reef prominent presence positioned organism ocean mouth minimal mammal likely light known image head gray gracefully gills fish fins fin eyes environment dorsal dolphin disturbance distinctive crescentshaped color clear calm body blue blacktipped blacktip behind aquatic aquarium animal agility