If you were Noah, what animals would you not bring on the Ark?

All the microscopic animals, the ones that can’t be viewed by the naked eye. How on Earth did Noah do it?! Beyond locating such tiny animals, how the heck did he ensure he had enough specimens of the right types to ensure breeding? As far as I know, Noah’s microscopes have yet to be found. Cheers to Noah and family, though, for somehow pulling it off!