Estuary

Where river meets tide: brackish, nutrient-rich water that raises much of the sea’s next generation.

Core Principles & Analysis

• Salinity swings hourly with the tide, selecting for tough, flexible specialists.
• A large share of commercial fish and shellfish species depend on estuaries as nurseries.
• Great port cities crowd estuaries, making them among the most human-pressured waters on Earth.

Specifications & Metrics

• COVERAGE: River mouths worldwide