Thryssa mystax is silver, darker dorsally. There is a distinctive dark blotch behind upper part of gill opening, which can easily identify the species from other "Thryssa" species. Caudal fin is yellowish. It feeds on planktons, fish larva, and small crustaceans like shrimp larva. Thryssa mystax The moustached thryssa ("Thryssa mystax"), also known as Gangetic anchovy, is a species of oceanodromous ray-finned fish in the family Engraulidae. It is found in the tropical western Indo-Pacific region from India, Sri Lanka to Myanmar and south to Java, and Indonesia. It is a small schooling fish found in depth of 0-50m. Maximum length do
Astyanax microschemos its middle caudal fin; a faint dark pigmentation is also present in the middle of caudal fin rays. The previously described stripe extends dorsally and ventrally close to the caudal fin base, forming a small caudal spot. The fish also exhibits a solitary black, narrow, and vertically elongate humeral spot, located over the second to fourth lateral line scales and which extends over 2-3 horizontal series of scales. Fins have scattered dark chromatophores. "A. microschemos" is only known from the river source of the Itapemirim River, in Espírito Santo, eastern Brazil. At the type locality where the animal was first