Ecosystems and Population Change

Does it possess a placenta?

This is a comparison of mammals versus fish.

These are two large and distinct groups of animals and the differences are prevalent than the similarities. It is important to explore some marked differences between mammals and fish. Usually, the fish live totally in water and the mammals are mostly terrestrial. However, the living habitats of some glamorous mammalian species, dolphins and whales, live in water while there are fish species with capabilities of ‘walking’ on ground and surviving without water for months. In addition to these adaptive radiations of both mammals and fish, the scientific base for classification is important.

Fish vs Mammals

- Being vertebrates, both fish and mammals are highly evolved taxonomic groups.

- The number of fish species is comparatively higher to mammals. But the mammals are more evolved than the fish.

- The adaptive radiations of the mammals to different environments are predominant and successful with dolphins and whales are adapted for aquatic habitat, bats have developed wings to fly, primates have a developed and large brain to conquer the terrestrial habitat.

- Fish are cold-blooded, scaly bodied, laterally flattened bodied, and finned whereas the mammals are warm-blooded, hairy bodied, not flattened, and mostly four-legged in the body forms.