The California Department of Public Health in the USA issues a warning against consuming seafood from an area off the southern coast where elevated levels of the toxic chemical domoic acid have been detected, with ingestion that can be fatal.

http://www.nbclosangeles.com/news/health/SoCal-Seafood-Containimated-With-Toxic-Chemical--106321793.html
http://www.ibtimes.com/articles/77356/20101030/california-department-of-public-health-channel-islands-seafood-
toxins-domoic-acid-poisoning.htm