1. the fish fauna or fish species of a particular region, period, or ecosystem
Usage: technical; used in biology, ecology, and paleontology

Examples

• The ichthyofauna of the Amazon River includes over 3,000 species.
• Scientists studied the ichthyofauna of the ancient lake to understand past climate conditions.
• The Mediterranean's ichthyofauna has changed significantly due to invasive species.
• Researchers cataloged the ichthyofauna found in the deep-sea trenches.
• The ichthyofauna of tropical coral reefs is among the most diverse on Earth.