SHRIMP CURLING AND MUSCLE OPACITY: CAUSES, SIGNS, AND EFFECTIVE SOLUTIONS
Shrimp curling and muscle opacity commonly occur in intensive high-density farming systems, especially with white-leg shrimp.
This condition does not usually cause mass mortality immediately, but it weakens shrimp, reduces immunity, slows growth, and lowers survival rates at harvest.
Early detection and proper treatment are essential to minimize losses.
1. Main causes of shrimp curling
Identifying the correct cause is the first step for effective treatment and avoiding unnecessary costs.
Mineral deficiency
The most common cause is a lack of essential minerals during molting.
Shrimp require Magnesium, Calcium, and Potassium.
Deficiency or poor absorption can lead to muscle opacity and curled or contracted bodies.
Temperature and environmental shock
When farmers lift feeding trays during hot sun or sudden rain, rapid temperature changes can cause shock.
This leads to sudden muscle contraction, resulting in curling and white opaque muscle, especially near the tail.
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2. Early signs of shrimp curling and muscle opacity
Farmers should monitor shrimp daily to detect early abnormalities.
Muscle color changes
Healthy shrimp have transparent muscle tissue.
When infected, the muscle along the back and tail turns white and cloudy.
If the condition persists, opacity spreads, leading to tissue damage and weakening shrimp.
Feeding tray observation
Shrimp curling on trays and reduced swimming ability are clear symptoms.
In severe cases, shrimp may show tail paralysis, weak movement, and become easy prey for predators.
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3. Effective treatment procedure for shrimp curling
When a high infection rate is detected, immediate intervention following Vietvet protocols is required.
Mineral supplementation in water
Apply high-dose mineral supplements (powder or liquid) directly into the pond.
Prefer highly soluble minerals for fast absorption through gills and exoskeleton.
Maintaining stable alkalinity and mineral levels can improve conditions within a few days.
Feeding-based mineral supplementation
In addition to water treatment, mix Vietvet mineral supplements into daily feed.
Vitamin C supplementation helps reduce stress, enhance metabolism, and accelerate muscle recovery.
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4. Sustainable prevention of shrimp curling
To maintain healthy shrimp throughout the farming cycle, farmers should apply regular biosecurity measures.
Water quality and temperature management
Maintain pond water depth between 1.2–1.5 m to stabilize bottom temperature.
Avoid disturbing shrimp during sudden temperature changes.
Regularly monitor Mg, Ca, and K levels to supplement before molting stages.
Modern farming practices
Use probiotics regularly to clean pond bottoms and create a healthier environment.
Adopt high-tech shrimp farming techniques to reduce environmental stress-related curling.
Conclusion
Although shrimp curling is not as contagious as viral diseases, it directly reflects shrimp health and pond management quality.
Proper monitoring and timely intervention ensure better survival rates and higher production efficiency.
Wishing farmers a successful and profitable shrimp harvest.
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