This is a disturbing image, without any specific meaning in mind, but nevertheless very evocative.
It could be an environmental illustration symboliseing the destruction of the ecosysten or the environment.
The fact that a snail is a slow creature could symbolise the way that nature cannot run away from the destruction of the environment that is occurring.
The image is a digital painting, based quite closely on photos of snails so that it looks realistic (which is important for the impact of the image).
The image could be used in environmental campaigns or media articles and reports about the environment.