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.
Dolphins are marine mammals known as cetaceans and are related to whales and porpoises. They range in size from the 4 foot Mauiâs dolphin to the 30 foot orca or killer whale. They band together in social groups called pods, and hunt for food such as squid or schools of smaller fish.ith over 40 species throughout the world, dolphin populations and species are found in many locations. The largest of the dolphin species is the Orca or killer whale, which is mostly located in the cold polar waters.