Iridovirus (130-330 nm)
Lates sp. and Siganus sp.
Infected fish have clusters of pear-like nodules up to 5 mm in diameter that develop on the skin, gills or fins resulting from an enlargement of tissue cells.
EFFECT ON HOST:
The disease is rarely fatal in older fish. It can be transmitted by cohabitation and exposure to contaminated water.
Signs of the disease, histopathology and EM