How is invisibility treated underwater? Does the water move around them? Can they be located by displacement? Is there anything that modifies concealment? Does how thick or murky have any effect? What if there is stuff in the water, like debris or seaweed?
[RPG] Invisibility under water
invisibilitypathfinder-1eterrainunderwater
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Best Answer
An invisible underwater creature is treated as having concealment.
From the Aquatic Adventures book, p46, discussing how various magic effects behave differently in an underwater environment:
So a creature that uses invisibility underwater will be visible, but still benefits from concealment.
Or, the creature can use invisibility bubble instead and will not be visible when underwater.
As for whether the water is murky, that won't affect an invisible creature, although it will impose penalties on Perception checks to notice them: