The painting signifies not only the plight of the human beings but also the aquatic life. If I imagine a world without water then either the marine world will come to an extinct or they will have to adapt flying. This is applicable not only to the marine life but to all the living organisms in general.
Also I have used a surrealist way of depicting the fish which in reality is not possible. We are more into race of urban-ism so I would request you all to venture to save water to ensure adequate supply of water for our future generation and to even let our fellow earth mates have a sound and healthy life.