All drains lead to the ocean, right?

We have had a big Nemo balloon in our house for the last month and a half. It is now looking flat and doesn't float anymore, so I told Jadyn that we needed to get rid of it. Remembering what we have done with our fish in the past that have had this same problem, she asked: "Should we flush it?" I guess that is the proper way to get rid of a dead fish if you are 4. No worries~Nemo did not go down the drain. All toilets are still in working order.