Although the microdetermination of arsenic in biological materials is of interest because of its toxicity, still the determination of arsenic in sea water has received but little attention, despite the fact that most of the marine animals and plants concentrate this element in their tissues. We are in some doubt about the physiological Rignificance of arsenic, as well Bs about the forms in which it occurs in the sea.
Gorgy, Samy, Norris W. Rakestraw, and Denis L. Fox. 1948. "Arsenic in the sea." Journal of Marine Research 7, (1). https://elischolar.library.yale.edu/journal_of_marine_research/646