Eerie fluorescent blue patches of water glimmering off Hong Kong’s seashore are magnificent, disturbing and potentially toxic, marine biologists say. The glow is an indicator of a harmful algal bloom created by something called Noctiluca scintillans, nicknamed sea sparkle. It looks like algae and can act like algae. But it’s not quite. It is a single-celled organism that technically can function as both animal and plant. These type of blooms […]