Mental pores in 2 pairs, both small, the first pair at front of chin Gill rakers (9-12 on lower limb) slender, as long as gill filaments at angle of arch, Second anal spine short, and Caudal fin truncate. Swim bladder carrot-shaped, with 17-22 pairs of appendages along its sides, the first not entering head. Sagitta with a tadpole-shaped impression, the tail of which is curved