To avoid excessive stress to fish and self infliction of injury in handling, transportation, hatchery management and explorative laparatomy by fish scientists and aquatic veterinarians, a safe, cheap, reliable sedative and anesthetic agent is mandatory. Ketamine HCl proves effective drug of choice. Its administration is easier and reversal guaranteed. Learn several bleeding techniques in fish research and parenteral drug administration in your aquaria for safety, health care management, and higher productivity in fish stock. For maximum productivity in fish farms, stress management is the key to success, learn simple techniques for obtaining sufficient blood for fish disease investigation and disease prevention in your farm.