P. mexicanum is included in Lassus et al.(2016) as harmful. It is mentioned as producing haemolytic toxins of unknown nature. However, as the material on which this information is based is benthic, it is likely that the information relates to
Prorocentrum rhathymum, not
P. mexicanum.
Lassus et al. (2016) further mention that
P. mexicanum produces FAT. However, the information referred to is from a congress abstract and the organism was not identified further. Its identity is therefore somewhat uncertain (Tindall et al. 1981).
True
P. mexicanum needs to be refound and its harmful potential to be re-examined.