dolphins can not stay in water long time like most aquatic animals
Dolphins are marine mammals, zebras are terrestrial mammals. Zebras are herbivores, but dolphins are carnivores. Thus zebras are prey animals and dolphins are predators. But the biggest difference between these to animals is that they do not look the same.
Amphibians can live both on land and water
Terrestrial animals can't just release sperm into their environment to fertilize eggs, where as some aquatic animals can, because sperm needs water to fertilize
a dorsal fin
dolphins are mammals
A shark is considered a fish. A dolphin is a mammal. While both may be considered aquatic with living in water, both are different in that respect. The mammals breathe air and produce milk for their offspring.
Monkeys have bigger thumbs.
The respiratory system of most non-aquatic animals is entirely enclosed in the human body and connected with the lungs. Many aquatic animals have developed open respiratory systems that include features like the gills.
Ichthyology is the study of the group of animals called fish. Fish are a group of aquatic animals with fins. Fisheries are entities engaged in the controlled harvesting of fish, generally for food.
Sharks are cold-blooded, and are a species of fish; Dolphins are warm-blooded, and are mammals.
A person can find pictures that show the difference between the genders of catfish in a book about catfish. It can also be found in a book about aquatic animals.
Human/people can talk but animals don't! >>actually, there's lots of evidence that some species do speak to each other (whales, elephants, dolphins, dogs, primates etc etc) >>The main difference seems to be that we kill each other for fun and profit, and other animals don't. >>>Chimpanzees have wars. Dolphins terrorize and rape members of their species for fun. It comes with intelligence.