👉 In evolutionary biology, an epifauna refers to a group of organisms that live together in the same habitat and share common characteristics. These organisms are often found in areas where there is little or no competition for resources such as food, water, and shelter. Epifaunalism can occur across various ecosystems, including oceans, lakes, rivers, forests, and deserts. Epifauna has been studied extensively by ichthyologists, who have used various techniques to identify them, such as the identification