▁but ▁there ▁is ▁no ▁scientific ▁cons ensus ▁as ▁to ▁the ▁exact ▁purpose ▁of ▁the ▁secret ion ▁or ▁the ▁p ore . ▁ ▁S . ▁gran ulos us ▁has ▁a ▁large , ▁dark , ▁ax ill ary ▁p ore ▁on ▁each ▁side , ▁just ▁below ▁the ▁hum eral ▁process . ▁ ▁The ▁body ▁color ▁is ▁sl ate ▁gray ▁to ▁o live ▁brown ▁with ▁a ▁dark ▁she en ; ▁ju ven iles ▁display ▁a ▁sp otted ▁pattern ▁which ▁f ades ▁with ▁age . ▁ ▁The ▁unders ide ▁ranges ▁from ▁pale ▁yellow ▁to ▁gray . ▁ ▁Most ▁of ▁the ▁species ▁of ▁Syn od ont is ▁of ▁Lake ▁Tang any ika ▁have ▁a ▁recogn izable ▁pattern ▁consisting ▁of ▁dark ▁tri angles ▁at ▁the ▁bases ▁of ▁all ▁of ▁the ▁ray ed ▁fins , ▁present ▁in ▁S . ▁gran ulos us , ▁and ▁the ▁back ▁edges ▁of ▁the ▁fins ▁are ▁white ▁to ▁yellow ish ▁in ▁color . ▁The ▁ca ud al ▁fin ▁has ▁a ▁black ▁bar ▁that ▁runs ▁from ▁the ▁base ▁of ▁each ▁lo be ▁to ▁the ▁top ▁of ▁the ▁fin . ▁ ▁The ▁bar b els ▁are ▁white ; ▁the ▁bases ▁sometimes ▁have ▁scattered ▁p ig ment ation . ▁ ▁The ▁maximum ▁standard ▁length ▁of ▁known ▁spec im ens ▁is ▁ ▁with ▁a ▁total ▁length ▁of ▁. ▁ ▁Gener ally , ▁females ▁in ▁the ▁genus ▁Syn od ont is ▁tend ▁to ▁be ▁slightly ▁larger ▁than ▁males ▁of ▁the ▁same ▁age . ▁ ▁Hab itat ▁and ▁behavior ▁In ▁the ▁wild , ▁the ▁species ▁is ▁en demic ▁to ▁Lake ▁Tang