Question

The only anesthetic currently approved by the USFDA for use on food fish is

• A. MS-222
• B. Benzocaine
• C. Quinaldine
• D. Clove oil

Hint:

MS-222 (Tricaine Methanesulfonate) is the gold standard of legally approved fish anesthetics worldwide, paired with a mandatory 21-day withdrawal period.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Anesthetics are used in aquaculture to sedate fish during handling, transport, sorting, spawning, and veterinary sampling to minimize stress and prevent physical injury.
However, chemical residues in food fish are strictly regulated by food safety authorities.

Step 2: Detailed Explanation:
Let us review the regulatory status of the listed anesthetics:
Benzocaine and Quinaldine are effective fish anesthetics but are not officially approved by the US Food and Drug Administration (FDA) for food-use aquatic species due to toxicity and residue persistence concerns.
Clove oil (active ingredient eugenol) is widely used as a natural alternative, but it is not FDA-approved for food fish because it is classified as an unapproved drug.
Tricaine Methanesulfonate, commonly known as MS-222 (also marketed as Finquel or Tricaine-S), is currently the only anesthetic approved by the USFDA for sedating and anesthetizing food-use fish.
Its approval is subject to strict guidelines, including a mandatory 21-day withdrawal period.
This means fish treated with MS-222 cannot be harvested for human consumption until at least 21 days have passed since the treatment, ensuring that all chemical residues have cleared from the edible tissues.

Step 3: Final Answer:
The only USFDA-approved anesthetic for use on food fish is MS-222.