macrofauna

This term is primarily used in ecological and biological research to distinguish organisms from microfauna and mesofauna based on size thresholds. It carries a technical, scientific register and is rarely encountered in casual conversation, appearing instead in environmental impact reports and academic papers.

As a collective noun referring to a group of animals, it is treated as an uncountable mass noun. It describes the entire community of visible organisms within a specific habitat rather than individual creatures, meaning it does not take a plural form in standard scientific usage.