The artwork describes the fish here is in a tragedy, It had left with two options. One is to stay in the small vase without exploring the world around and adjust to it, Other is to take the risk and go for the bait. It's stuck in a tricky situation.
In the same way, we people have two options in our life. One is to adjust with what we have and the Other is to explore new things at our own risk for which the outcome is unknown. What will you choose?