Although dietary Zn toxicity to turbot is absent up to 1100 mg Zn/kg feed , aqueous Zn is more toxic to marine fish with 96-h-LC50 values ranging between 8 and 21.5 mg/l and concentrations as low as 0.3 mg/l leading to deformities and increased mortality in red sea bream (Pagrusmajor) larvae after 10 days of exposure