Kingdom Animalia Characteristics. General characteristics of the Kingdom Animalia are as follows: Animals are eukaryotic, multicellular and heterotrophic organisms. They have multiple cells with mitochondria and they depend on other organisms for food.Habitat-Most of the animals inhabit seas, fewer are seen in fresh water and even fewer on land.he Kingdom Animalia is characterized by eukaryotic and heterotrophic organisms. They are multicellular and lack cell wall. They depend directly or indirectly of plants for their food.