Which are some characteristics land and sea animals share?

Scientists have discovered a 405-million-year-old fossilized fish that shares characteristics of modern bony fishes and land vertebrates. Hundreds of millions of years ago, bony sea creatures of the group Osteichtheyes hit an evolutionary fork in the road. read more

A few common characteristics would be: gas exchange, a circulatory system (open or closed), similar modes of reproduction, and a similar food chain consisting of photosynthesizing producers and decomposers, all the way up to predators. read more

From habitat to adaptations, land and sea dwelling animals have both similar and different characteristics. The most differences lie in body parts, body coverings and behaviors, such as how the animal moves. read more