Acute Toxicity of 14 Different Kinds of Metals Affecting Medaka Fry

We examined the acute toxicity of 14 different kinds of metals affecting medaka fry and from the results, arranged them according to the order of intensity level of acute toxicity. The most toxic metals to medaka fry were Ag, Hg, Cu, and Cd, the second most toxic were Zn, As, Cr, Ni, and Pb, and the third most toxic were Se, V, Fe, and Co. The metal least toxic to medaka fry was Mn