草海桐（学名：Scaevola sericea）为草海桐科草海桐属下的一个种。

Scaevola taccada, also known as beach cabbage, sea lettuce, beach naupaka, naupaka kahakai (Hawaiian), magoo (Divehi), merambong (Malay) and ngahu (Tongan) is a flowering plant in the family Goodeniaceae found in coastal locations in the tropical areas of the Indo-Pacific. It is a common beach shrub throughout the Arabian Sea, the tropical Indian Ocean and the tropical Islands of the Pacific.