Does the sea shed tears (流泪)? Yes, it does. The “tears” are blue. At the end of April, some blue dots (点) appeared (出现)near the Californian coast (加州海岸) in the US. They looked like shining stars in the sky. Scientists call the blue dots the “blue tears of the sea”. They are caused by fluorescent algae (荧光藻类). They look beautiful, but they are bad for sea life.