- Theywerefightingahydraheadedmonster.Wouldhave4coresanditsinternalcodenameishydra.ThemainerosionpatternsinthenorthofHebeiprovincearewind-erosionandhydra-erosion.Acoelenterate,suchasahydraorcoral,havingacylindricalbodyandanoralopeningusuallysurroundedb...
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