# Sandbox.WaterBody.UnderwaterParticleDriftSpeed

```csharp
float UnderwaterParticleDriftSpeed { get; set; }
```

Speed of each speck's independent wandering motion. Zero freezes the world-anchored field.
Changing speed preserves the current positions, including when stopping and resuming.

Declared in [Sandbox.WaterBody](/api/Sandbox.WaterBody).
Assembly: `Sandbox.Engine`.