Exophthalmus caused by thyroid tissue in the choroid layer of the eye in Coris gaimard.

Abstract

In the aquarium of the “Wilhelnia” zoo of Stuttgart, Germany, a Cons gaiiizard developed a marked exophthalmus at the right side. The fish had lived in the zoo for about 15 months, and was feeding normally. Other fish of the same and different species living in the same tank showed no signs of disease. There are various causes of exophthalmus in fish, the most common being bacterial infections, such as those caused by Mycobacteriuni and Aeromonas spp., or parasitic larvae.