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
Elongate surgeonfish longitudinal yellow stripe runs across the eye and splits in two lines extending anterior the eye. The superior lip is also yellow. The dorsal and anal fin are bluish with a yellow reflection, the base of latters is underlined by a fine black line. The slit of erectile scalpel is darker. Its erectile spine, sharp as surgeon's scalpel, located at the base of the tail is a dread defensive weapon. This fish has a wide distribution in tropical waters going from the west part of the Indian Ocean to the archipelagos in the middle of Pacific Ocean, so it's widespread