Our Fish Died

We had two mechanical fish that would swim in the pool. They no longer would work, we tried changing batteries but that didn't work either. Yesterday, while we were at Target we looked at buying a new one. Upon reading the package I found out that they are not to be used in salt water. I guess we killed our fish. They were fresh water fish, not salt water fish. I guess we won't have any cool fish swimming around in our pool.