Main Difference Aquatic vs Terrestrial Animals. Broadly there are two main modes of nutrition in all organisms. Vertebrates 3097131 By Jesus Garrido Vegas Via Slideshare Vertebrates And Invertebrates Vertebrates Invertebrates Most known animal phyla marine species. . Sea animals like dolphins and whales live in water but unlike fishes they do not possess gills for respiration. These animals breathe in through their nostrils and lungs. Such organisms are known as autotrophs Gk. Tetraploid organisms are with four sets of chromosomes. Aquatic and terrestrial are two classifications of animals based on the type of ecosystem they are found in. Indeed in 2013 at a zoo in Florence Italy a male zebra climbed a zoo fence in order to mate with a female donkey. The defining properties of living organisms are-. Nutrition- Taking in nutrients which are organic substances and mineral ions containing raw materials and en...