Metomidate hydrochloride is primarily used as an anesthetic agent in veterinary medicine, particularly for fish and amphibians. It is effective in inducing sedation and anesthesia, allowing for safe handling, surgical procedures, or diagnostic examinations in these species. Its rapid onset and short duration of action make it suitable for short-term immobilization. Additionally, it is sometimes used in research settings to study the effects of anesthesia on aquatic organisms. Its application ensures minimal stress and discomfort to the animals during medical or experimental procedures.