Crawfish have a few diseases.

• A. True
• B. False
• C. Not Sure
• D. Rare

Answer: (A)

Crawfish can be affected by several diseases, just like other aquatic animals. They have immune systems that can be challenged by a range of pathogens, and in farming or natural settings these diseases can emerge when conditions are right. Known issues include crayfish plague caused by the water mold Aphanomyces astaci, bacterial infections such as those caused by Vibrio or Aeromonas species, fungal infections like Saprolegnia, and various parasites. Environmental stressors common in aquaculture—high stock density, poor water quality, temperature fluctuations, and limited water exchange—increase the risk and severity of these diseases. Because multiple pathogens and conditions can cause disease in crawfish, the statement that crawfish have a few diseases is true. This is why disease prevention and management—monitoring health, maintaining good water quality, quarantine of new stock, and biosecurity measures—are essential in crawfish production.