LJ, Heather and I have got four fish. They live on our kitchen counter (in an aquarium, duh) and we take care of them. We're even members of PetCo customer program now.
The reality is that we are revisiting what a Christian's interaction with creation says about God. How we treat living things has to say something about God. It is a major part of reorienting our faith to get out of an industrial age in our religion.
So we care for some fish, and it helps us to become the people that God originally created us to be. Working out our salvation with some goldfish. Taking a quiet time, where all I do is watch the fish and interact with them for a while.