Fish
Definition of Fish Hierarchical Category as it relates to Animals, Amphibians, Placozoans, Insects
Unidentified Placozoans
An expansive domain in the biological kingdom encompassing various aquatic life forms, ranging from the finned creatures recognized as fish, to the small, often winged arthropods known as insects. It also includes the enigmatic and simple multicellular organisms termed Placozoans, alongside their unidentified counterparts. This category extends to amphibians, the cold-blooded vertebrates that have an aquatic phase of life. Lastly, it is all-encompassing of all forms of animals, the multicellular eukaryotic organisms that form the biological kingdom Animalia.