AP: Corals at remote atolls northwest of the main Hawaiian islands suffered some bleaching this summer as ocean temperatures rose to higher-than-normal levels for a couple of weeks, but they were spared the large-scale mass bleaching observed this year in Indonesia and other parts of Southeast Asia, scientists said Wednesday. Corals appear white or “bleached” when the ocean becomes too hot and they expel the algae they rely on to survive. Corals may recover if the algae returns, but …