We've been studying the behavior of our goldfish, Spongebob and Patrick (S&P) and observing their reactions to changes in their environment. When we redecorated and added gravel, a plant and a castle, we noticed that S&P were more active. They love to swim around and hide behind the plant and inside the castle.
When we turned off the lights, S&P became very still, and when we turned them back on, they started swimming again. We're recording all of our findings in our science journals.