Your camera is clearly underexposing the picture. That's the easy part. So, we need to figure out if it's because of a setting, or if the metering is just coming out wrong.
There are a few different metering algorithms - average, spot, center weighted, matrix, etc. In varying ways, the camera's light meter looks at the scene, determines how light or dark it is, and selects a shutter/aperture combination that it thinks will be the proper exposure.
I suspect that your camera is using a metering mode that uses only the center area to determine exposure. The white spray and skin colors would dominate the evaluation. The camera always tries to meter the scene towards a neutral grey. If the metering algorithm thinks the scene is light, it will make it darker so that the average is grey (like your spray turned out).
See what other metering modes are available in your camera, and if any of those give better results.
Also, check if you have exposure compoensation turned on. This usually reads as numbers from -2 to +2 in 1/3 steps. 0 allows the camera to make the decision, any negative compensation darkens the photo, positive lightens it. If you have negative compensation, dial it back to 0. If it's at zero, you could try boosting it to +1 or +2 and see how much that helps. More than likely, if it's at 0 now, the metering mode needs to be changed.
