red tides

同根派生

These red tides can also cause fish kills.
这些赤潮也可能造成鱼类死亡。
But Red Tide isn't the only problem.
但问题不只是赤潮。
Red Tide is usually caused by agricultural pesticides, detergents or conditions, which increase nutrients in the water.
赤潮通常是由于农业杀虫剂、清洁剂引起的，或是因为营养增大的水域状况。
But with this type of Red Tide in Ago Bay, we unfortunately still don't know the cause.
但对于AGOBAY的赤潮类型，我们还没有找到原因。
The result showed most of red tides in prawn ponds were polyphase.
研究结果表明:发生在该县虾池中的绝大多数赤潮为多相型赤潮。