▁any ▁secondary ▁branches ▁present . ▁ ▁The ▁skin ▁of ▁S . ▁gran ulos us ▁has ▁a ▁large ▁number ▁of ▁tiny ▁vertical ▁skin ▁fol ds . ▁The ▁exact ▁purpose ▁of ▁the ▁skin ▁fol ds ▁is ▁not ▁known , ▁but ▁is ▁a ▁characteristic ▁of ▁the ▁species ▁of ▁Sy nd ont is ▁that ▁are ▁en demic ▁to ▁Lake ▁Tang any ika . ▁External ▁gran ular ▁pap illa ▁are ▁present ▁and ▁extend ▁onto ▁all ▁of ▁the ▁fins . ▁ ▁The ▁front ▁edges ▁of ▁the ▁d ors al ▁fins ▁and ▁the ▁p ector al ▁fins ▁of ▁S ynt ont is ▁species ▁are ▁hard ened ▁into ▁st iff ▁sp ines . ▁ ▁In ▁S . ▁gran ulos us , ▁the ▁sp ine ▁of ▁the ▁d ors al ▁fin ▁is ▁long , ▁about ▁as ▁long ▁as ▁the ▁head , ▁is ▁almost ▁completely ▁straight , ▁is ▁smooth ▁on ▁the ▁front ▁and ▁ser r ated ▁on ▁the ▁back , ▁and ▁ends ▁with ▁short , ▁black ▁fil ament . ▁The ▁remaining ▁portion ▁of ▁the ▁d ors al ▁fin ▁is ▁made ▁up ▁of ▁seven ▁to ▁eight ▁branch ing ▁ray s . ▁The ▁sp ine ▁of ▁the ▁p ector al ▁fin ▁is ▁slightly ▁cur ved , ▁almost ▁as ▁long ▁as ▁the ▁d ors al ▁fin ▁sp ine , ▁with ▁small ▁ser r ations ▁on ▁the ▁front ▁and ▁large ▁ser r ations ▁on ▁the ▁back . ▁The ▁p ector al ▁sp ine ▁ends ▁in ▁short , ▁black ▁fil ament . ▁The ▁rest ▁of ▁the ▁p ector al ▁fins ▁are ▁made ▁up ▁of ▁seven ▁to ▁eight ▁branch