Turns out the tale of a clownfish father swimming across the Australian current to rescue his son isn't all that far-fetched after all. New Scientist recently published an article stating that under the influence of carbon dioxide, clownfish are more likely to engage in risky behavior. So was Marlin in Finding Nemo "fish drunk" when he set out to rescue his son?
As the article states, carbon dioxide in the ocean acts like alcohol on fish, leaving them less able to judge risks and prone to losing their senses. Such behavior includes but is not limited too:
exploration of dangerous habitats
ignorance of natural predators
and the ruining of jokes.
So Marlin was "fish drunk" off carbon dioxide this whole time?! I can see it. In fact, it makes the movie much more hilarious if you look at it this way. Let's not forget he wasn't the only clownfish getting silly off that "ocean drank" though...