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
Reicheltia halsteadi at the eyes, between the eyes and pectoral fin base, just behind the pectoral fin base and are extending down side at dorsal fin base, and at the caudal fin base. Brownish blotches and yellow green background continue to mid-lateral region of the fish and are replaced by small silverfish-grey flecks which gradually merges into the white belly. The cheeks and lower lateral surfaces have a silverfish-grey sheen. Spinose region of the belly is white. All fins are pale, and a reddish-brown patch is seen on anterior of pectoral fin insert. Halstead's toadfish is distributed in the southwestern Pacific, from