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
Plains topminnow The plains topminnow also has bronze reflections with faint blue-green cross-hatching on its back and sides. Its fins are colorless or yellowish in immature fish, females and non-breeding males. There are no black bars on the fish’s body, which makes it distinguishable from the banded killifish, a more common species, which is often found in the same habitats as the plains topminnow. Two other distinct features of the plains topminnow are its rounded caudal fin and the absence of an externally visible lateral line. The plains topminnow has 33 to 37 ctenoid scales in its lateral line. The dorsal fin