When you hear animal you think of large creatures like a lion or tiger but there is more to animals than just large consumers. They are all multicellular and Eukaryote while having to consume their food known as Heterotrophic. Though not all animals share the same traits some have a backbone known as vertebrate and some don’t have a backbone called invertebrates. You can further more break them into smaller sub groups like Sponges, Corals, Worms, Insects, spiders for invertebrates. While animals with a vertebrate (back bone) can be split into Fish, Reptiles, Birds, Amphibians, Mammals.
First is Sponges they are invertebrates and get food by filtering sea water to get their nutrients. They are even considered to be the oldest animal on earth. Sponges have a thin skin with holes that make a large canal of chambers that a current can run though. They live in the ocean and bodys of water.
Corals are in the phylum Cnidaria which also include jellyfish which are split into the free-swimming form called medusa and stationary form called the polyp. Both forms surprisingly share simiar traits like both coral and jellyfish have a single opening that is used as a rectum and mouth. These are found in oceans and bodys of water.
Worms are in a group of their own with very similar traits yet there are over 20,000 species. At the same time they differ with some worms living inside other organisms and some living in large bodys of water scavenging for food. Worms are invertebrates with soft tissue that contract and relax to move the worm. Worms are important to take in nutrients and then release nutrients that are vital to plants.
Insects are in the phylum Arthropoda have animals like spiders Crustaceans and Centipedes. All insects have a segmented body and have an exoskeleton that they have to molt. Insects are one of the most diverse in the animal kingdom with different features like wings, claws, and antennae.
Fish have a back bone putting them in the category of
vertebrates with a backbone.