What disease causes farmed red sea bream to turn white in body color

    This is lymphocytic leukemia. In artificially farmed red sea bream, some fish turn white in body color, swim alone away from the school at the water surface, and have ulcerative lesions on the body surface. Dissection and examination of the fish show enlarged kidneys, symptoms of green liver, and ascites containing blood in the abdominal cavity. After red sea bream develop the disease, the mortality rate can reach 10-20%. No effective prevention or treatment method has yet been found, but when red sea bream develop this disease, antibiotics and large amounts of multivitamins should be fed promptly, which can reduce deaths and lower economic losses.