There are no records of toxin production by this species in nature. However, when originally described from Florida (Norris et al. 1985), cultured cells showed limited toxicity based on the mouse bioassay
Norris, D. R.; Bomber, J. W.; Balech, E. (1985). Benthic dinoflagellates associated with ciguatera from the Florida Keys. I. Ostreopsis heptagona sp. nov. <em>In: Toxic Dinoflagellates (Ed. by D.M. Anderson, A.W. White & D.G. Baden), pp. 39-44. Elsevier Science Publishing.</em>