Dolphin is a common name of aquatic mammals within the infraorder Cetacea. The term dolphin usually refers to the extant… https://www.rawpixel.com/image/4021369/photo-image-ocean-nature-cuteFree Image from public domain licenseDolphin at playDolphins are a widely distributed and diverse group of aquatic mammals. They are an informal grouping within… https://www.rawpixel.com/image/4022500/photo-image-ocean-sea-waterFree Image from public domain license