1. a small silvery fish found along the Pacific coast of North America that comes ashore to spawn on sandy beaches

Examples

• The grunion run occurs on certain nights when the fish come ashore to lay their eggs.
• We watched the grunion spawn on the beach during the full moon.
• Grunion fishing is popular along the California coast.
• The silvery grunion wriggled in the sand as it deposited its eggs.
• Marine biologists study grunion spawning patterns to understand their life cycle.
• Beachgoers gathered to witness the spectacular grunion run at midnight.