1a. Ciliae of the ciliate scales on doraal part of hend and on ventral surface brush-like crected.......J.Jubatus J.melanobrachium)
1b. Scaloe when ciliate normal........ ....................2
2a. Scales on head and body cycloid; dorsal rays 24-28; spinous dorsal twico in soft part; two anal spines, slender, 1/1/2 in eye. ....................J. trachycephalus 2b. Scales on head, at least on opercles, cheeks and suborbitals cyeloid, othowise ciliate....................3
3a. second anal spine weak and short, twice eye or less. ........4
3b. Second annu spine robust, equal half of head or longer. .....5
4a. Dorsal rays 25-26.................. ...J. carutte
4b. Dorsal rays 28-30 J. dussumieri
5a. Dorsal rays 28-30; spinous dorsal deoply incised origin of anal opposito 12-13 dorsal rays; free border of snout deeply quadrilobato................J. belengeri
5b. Dorsal rays 25.....................6 6a. Ltr. 6/15................. J.ossous 6b.Ltr.7/12-13....Lnovae-hollandiae