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.
They are often called marine mammals. Dolphins and porpoises are small whales. There are around 80 different kinds or species of whales and dolphins. Whales can be divided into two groups: those with teeth, called toothed whales, and those without called baleen whales.