Malachite green (MG) and crystal violet (CV) are considered
toxic and mutagenic antifungal and antiprotozoan agents.
MG has been banned from use in EU and US aquaculture farms (2004/
25/EC-Article 1) because dietary exposure highlighted significant
mutagenic and carcinogenic effects in rats ); fluoroquinolone (FQ) has been legal in EU until
1990