Eli5: if house plants die from too much water, how does plants like seaweed survive?

Question

Eli5: if house plants die from too much water, how does plants like seaweed survive?

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Answer 1

Seaweed isn’t actually a plant like houseplants. It’s an algae. They aren’t to closely related to each other, this is kinda like asking why fish don’t need to breathe but cats do. Seaweed evolved in water and is adapted for it. Go houseplants evolved on land and are not adapted to it.

With plants, the roots don’t get enough oxygen when in water and don’t work properly. Algae doesn’t have roots so that’s not an issue. For true aquatic plants, the roots are structurally different and allow oxygen to flow within the plant better.