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Message: <blockquote data-quote="haiiro" data-source="post: 1938765" data-attributes="member: 1891">Depending on the minerals involved, the waters might...- Be immediately hazardous -- caustic (highly acidic or basic), damaging to living or nonliving material (or both), give off fumes, etc.- Have low visibility beneath the waves (anyone swimming underwater who wasn't adapted to it wouldn't be able to see easily or at all)- Make water breathing magic not function normally, because of the high concentration of silicates/whatever- Throw off compasses, because of the presence of large amounts of widely-dispersed ferrous metals (may not by sound science, but could be cool!)- Have different characteristics in different areas, as tides and other forces creating sections that spawn floating seaweed islands with enough anchorage to walk on, bubble with noxious substances, or have magical effects, etc.- Cause the rainfall over the ocean to take on some of the characteristics of whatever hazardous substances are involved (again, no idea if this is sound science)- Make things rust more quickly, perhaps making metal fittings, anchors and other mainstays of some ships impractical- Have quasi-elemental qualities, warping creatures after long exposure, being treated differently for the purpose of water-based spells, being alive as one organism on some level, etc.Just a few ideas off the top of my head. <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":)" title="Smile    :)"  data-smilie="1"data-shortname=":)" /></blockquote>

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