Known Occurrence

Conjecture

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Special Waves are events in Splatoon 2's Salmon Run mode. A wave is indicated to be special if Mr. Grizz has alternative dialog before the wave begins.

List of special waves

• Shoreline wave — The water on the map is lowered to its lowest point, revealing a shore. Salmonids and (typically) another goal will spawn near the shore.
• High tide — The water on the map rises, hiding a portion of the ground in water. Salmonids will spawn closer to the center of the map.
• Cohock wave — All non-boss salmonids are replaced with Cohocks. Ink Cannons will appear to help the players defeat the horde. Only confirmed to occur alongside shoreline waves.
• Griller wave — All salmonids are replaced with Grillers and Smallfry. Smallfry spawn in small groups, while grillers show up one at a time. Later in the wave, multiple Grillers may appear at a time.
• Mothership wave — All salmonids are replaced with Motherships. One mothership will spawn at a time.
• Fog wave — Fog will cover the arena, making it more difficult for players to see.
• Golden One wave — Salmonids won't spawn from the shoreline, and Boss Salmonids won't appear. There will be gushers scattered throughout the map. Attacking gushers will release lesser salmonids or the Golden One.