Tiger salamanders' markings are variable throughout their extensive range, but the most common marking resembles the vertically striped pattern of their mammalian namesake.
All are air-breathing, warm-blooded mammals that nurse their young. The difference between a dolphin and a porpoise has to do with their appearance: dolphins have longer snouts, bigger mouths, more curved dorsal fins, and longer, leaner bodies than porpoises. 1  Share on Facebook.  Tweet on Twitter.
Porpoises only make up around 6 of the 90 or so species of marine mammals within the cetacean family. All cetaceans (whales, dolphins and porpoises) fall into one of two sub orders which are referred to as the baleen whale and toothed whale suborders based on their physical characteristics.