To me, one of the most interesting aspects of the Ark design is its HVAC system. Many animals are highly dependent on a consistent temperature and environment that meets their normal lifestyle, so would have to have this provided for their seven-month cruise. Some animals are adapted for arctic conditions, some for the tropics. Some thrive in wet conditions, some in arid. Even humans, who have adapted to more habitats than any other animal, cannot survive unprotected for more than a few hours in the harshest deserts or the most frigid arctic zones, though there are adapted animals living in both places. So I wonder, how did Noah generate some rooms with dry, baking heat, and others with bitter cold, all on the same Ark? I'm sure that zookeepers would love to know the secret.
In a similar vein, how did Noah provide for all the freshwater animals? They couldn't have survived seven months of saltwater, so Noah must have taken them all on board as well. He must have provided the Ark with a wide diversity of ponds for all the freshwater fish, amphibians, insects, crustaceans, molluscs and others, and set all these different ponds to the correct temperature and chemical conditions. And how did he collect them, and disperse them after the Flood? Even taking the Ark on a sea cruise before the Flood would not have allowed him to visit all the freshwater habitats, and afterwards, of course, the Ark was on Mt. Ararat, so I am at a loss as to how he got them back to their ponds after the Flood was over.