Though Cephalorhynchus heavisidii is not typically vulnerable to predation, humans pose a potential threat due to by-catch. In general, dolphins are subject to retaliatory killings by local fisherman and are sometimes slaughtered for their meat, which is considered a delicacy in Japan. However, the biggest threat to dolphins seems to be accidental killing. Drift fishing nets catch everything in their paths, including dolphins, and prevent them from reaching the surface for air. It has been estimated that drift fishing nets have killed more than 30 million dolphins worldwide since the 1960's.
- Humans (Homo sapiens)