Requires Unity 3.5.7 or higher.
A small underwater effect pack. Bubbles, particles floating in water, lightbeams, and some fish. This package contains no models, just particle systems and the background.
Webplayer Demo Here!
If you plan to use it on mobile devices, please make it so that there are no large particles in front of the camera, because it can cause slowdowns due to increased screen redraw. So instead of wide lightbeams for example, use the thinner ones. Otherwise these effects work well on mobiles.
Rescaling particle systems isn't trivial, but you can purchase a tool for that, for example Particle Scaler.
If you have any questions, you can contact me at firstname.lastname@example.org.