cant wrap my head around it rn
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When considering if something will float in a fluid the relevant factor is their comparative density. A boat floats on water because its overall density is less than that of an equivalent volume of water; the volume of their hull under the water exactly equals the volume of water which would weigh as much as the boat.
If for example you had a very dense fluid such as mercury then relatively dense things can float in it, like solid iron! Things which have a very low density can also float in relatively low density things, like a helium balloon can float in the air. Even lowering the density of air a small amount such as by heating it will cause it to rise relative to the other air.
With aerated water you are taking a volume of water and lowering its density by filling it will small bubbles of air. A boat which can float on water may no longer float on water full of those small bubbles as it lowers the average density below that of the boat’s hull.
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