Tiger salamanders' markings are variable throughout their extensive range, but the most common marking resembles the vertically striped pattern of their mammalian namesake.
Dolphin vs. Porpoise. Dolphins and porpoises are cetaceans â marine mammals â that are closely related to whales. Dolphins belong to the Delphinidae family and are up to 30 feet long. Porpoises, belonging to the Phocoenidae family, are smaller and stouter, with other anatomical differences. Though both animals are very intelligent, dolphins are deemed to be more social and live in larger, more stable groups.
The pygmy hippo has adaptations for spending time in the water but is much less aquatic than the hippo. Its nose and ears close underwater just like a hippo's do, but its head is rounder and narrower, its neck is proportionally longer, and its eyes are not on the top of its head.