Well,
There are no animals of the clean kind depicted, such as sheep which according to the Bible account either 7 or 14 each were taken on the ark. They must still be on the ark or outside the picture margin.
As to the carnivores, Noah had not yet been given the law against blood. The WTS teaches that at this time humans started eating animals and at this time certain animals became dangerous to humans.
The WTS teaches that "kinds" were taken on the ark. If polar bears were taken on, where are the black bears, the brown bears, the Kodiaks....
Even as an educated child, I found the WTS pictures unrealistic and simplistic, lacking in basic science.
Blondie