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>> “How did they feed all those animals on the ark for 7 months?” <<
That is explained in the word. they had six pairs of every clean animal, and one pair of each unclean animal.
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Spiders are unclean so they had 35,000 pairs of spiders? As well as 12,000 pairs of ants?
Is that what you are saying?
There are actually 950,000 species of insects. Even flying insects could not survive for 7 months outside the arc due to the earth being completely covered by water and having no place for insects to land.
So you are saying Noah house and fed all 950,000 species of insects on the ark. That is quite a feat to house and feed all those insects for 7 months.