Corrected entry: When the bucket launches, Marlin and Nemo fly into a small plastic tank with a toy fish. The tank was filled with freshwater, which means Marlin and Nemo would have died in there before they had a chance to get out.
Corrected entry: The whale shark keeps bumping into nearby things, claiming she is nearsighted. She is actually farsighted (able to see at a distance). Nearsighted would indicate she can see nearby objects.
Correction: Destiny IS nearsighted. She can't see the objects that are far away until they're very close which is why she bumps into them.
Correction: Salt water fish will die after a while if left in fresh water, but it takes between hours and days depending on the fish. In fact a common method to kill some parasites is to place the salt water fish in fresh water for a few minutes (it is not recommended to do it for more than 10 minutes). Marlin and Nemo were not in the tank for very long so would not have died, and probably would not have shown any adverse symptoms.
jimba