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Hydrocoral is described in multiple online sources, as addition to our editors' articles, see section below for printable documents, Hydrocoral books and related discussion.

Suggested News Resources

Mobile Cities and Creepy Creatures in Civilization: Beyond Earth - The Rising Tide
For the hydrocoral one, you find the overmind, and you go and find the nodes, and investigate them, and now that you've completed the quest, you get visibility around all hydrocoral.
Living fossils and rare corals revealed
"Around 200 meters (656 ft), only very little sunlight penetrates and the ecosystem is dominated by black corals, hydro corals and soft corals.
Secrets of the Coral Sea revealed
Deeper down, to 450m, where almost no light gets through, the ROV found found black corals, hydro corals and soft corals. ROV coral sea. Large spider crab (unknown species) reacting to ROV lights, from about 700m depth.
Sid Meier's Civilization: Beyond Earth - Rising Tide Review
When other leaders attacked, I was ready, but mostly I just found myself clearing out the alien hydrocoral that now blocked the watery paths between landmasses. Speaking of those other leaders, Rising Tide's massive diplomacy overhaul makes interacting ...
Reef Check California Completes Expedition Along Big Sur Coast
Once again the early morning and cold water misery was quickly replaces by the breathtaking reef. Wolf eels splayed lazily in nest of red kelp while abalone hid in holes and a purple hydrocoral grew along the side of a pinnacle.

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