Nahoře vodnář modroskvrnitý, obr.D.Palani et al., Diversity, biology, and ecology of sea snakes (Hydrophiidae) distributed along the Parangipettai Coast, southeast coast of India, International Journal of Current Research, Vol. 4, pp. 062-069, May, 2010, dole hlavový cévní pletenec vodnáře modroskvrnitého, obr.Dr Alessandro Palci, Flinders University.