Thryssa whiteheadiThryssa whiteheadi, the Whitehead's thryssa, is a species of ray-finned fish in the family Engraulidae. It is found in the Western Indian Ocean.SizeThis species reaches a length of.EtymologyThe fish is named in honor of Peter J. P. Whitehead, of the British Museum, whose 1965 review of Red Sea clupeoids "was a major step in understanding the species of this region".