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
Hisonotus acuen two colors being divided by a brown stripe that runs from the snout to the caudal peduncle. The fins are transparent with brown dots on the rays. The tail fin is transparent except for a dark spot at the base. Males have a genital papilla, a feature missing in females. Features can vary widely among populations, with the most variation occurring in the body's depth at the dorsal fin and in the snout and abdomen length. "H. acuen" is found in small streams that are part of the Xingu River basin in Matto Grosso, Brazil. Individuals are usually found in