Solutions for Yellow Gills and Black Gills in Shrimp

2026-06-05

The gills of shrimp are the organ that directly interfaces with the external environment, yet they possess relatively weak defensive capabilities. When water quality is poor or the shrimp’s health is compromised, numerous pathogenic agents can trigger gill diseases, leading to symptoms such as yellowing and blackening of the gills. Yellow gill disease can be categorized into parasitic infections and bacterial‑induced yellow gill. Bacterial yellow gill is primarily associated with deteriorating water and bottom conditions, as well as weakened shrimp health; moreover, yellow gill often serves as an early warning sign of gill rot. If not addressed promptly, it can readily progress to bacterial black gill and eventually develop into gill rot. Once gill rot has set in, recovery becomes extremely difficult.

I. Yellow Gill Disease in Shrimp Caused by Ciliate Infection

Affected shrimp exhibit sluggish activity, reduced appetite, slightly everted opercula, and swollen gills; the gill filaments are covered with numerous pale yellow, filamentous structures. Microscopic examination reveals a heavy infestation of ciliates densely attached to the gill filaments.

 

Solution:

Day 1: Evening external spraying High-Calcium Hard Shell Treasure (3 mu per package) + Multivitamin for Aquaculture (4 mu per package) Enhances the health and vitality of prawns.

The next day, external spraying. Optical fiber (2–3 mu per package) to eliminate ciliates.

Day 3 Use Clears toxins and calms the mind. Detoxification and Bottom Modification Overlord Bottom treatment: while adjusting water quality, it also eliminates bottom-dwelling ciliates to prevent their reattachment.

II. Yellow Gill and Black Gill Diseases in Shrimp Caused by Bacterial Infections

In the early stages of the disease, the shrimp gills appear pale yellow; as the condition progresses, the gill filaments become increasingly swollen and loosely arranged, changing from yellow to yellowish-brown. In severe cases, the gill tissue becomes brittle and may even undergo necrosis, leading to black gills and gill rot.

Solution

Day 1: Evening external spraying High-Calcium Hard Shell Treasure (3 mu per package) + Multivitamin for Aquaculture (4 mu per package) Enhances the health and vitality of prawns.

The next day, external spraying. Zhongren Gold Iodine (6 mu/bottle, 1000 ml)➕ Five Yellow Detoxifying Liquid (2 mu per 1000-mL bottle) for disinfection.

Also taken orally. Astragalus polysaccharide ➕ Liver and Gallbladder Health , enhance nutritional care to accelerate the recovery of prawns.

During the high-temperature season, when farming prawns, care should be taken to prevent the water from becoming overly rich or turbid; regular application of… is recommended. EM Golden Dew Manage water quality. Before sudden weather changes and the peak molting period, apply Stress‑Relief Detoxifier and High‑Calcium Shell‑Strengthening Agent in advance to replenish shrimp vitality and mitigate stress. Regularly use Sulfur‑Based Bottom‑Conditioner and Arc‑Lid Clean to control Vibrio bacteria and prevent bacterial infections in shrimp.

Key words:

Return to List

Previous:

Sudden Weather Change—Stress Management Protocol for Whiteleg Shrimp

Next:

方案 for Improving Color Uniformity in Whiteleg Shrimp