“Finding Nemo” has some accurate science facts baked in.
Finding Nemo" came out in 2003 and was beloved for its storyline and (somewhat) accurate depiction of life in the ocean.
Clownfish really do look like that and live in sea anemones.
There is a “whale language” though Dory probably can’t speak it.
Marlin probably could survive being stung in the forest of jellyfish because of a protective layer of mucus that clownfish have.