▁South ▁African ▁re df ins ▁in ▁Pseud obar bus . ▁It ▁is ▁t et rap lo id . ▁Its ▁closest ▁living ▁relative ▁is ▁probably ▁the ▁Cl an will iam ▁re df in ▁( P . ▁cal id us ). ▁ ▁It ▁is ▁a ▁small ish ▁fish , ▁just ▁about ▁ ▁long ▁at ▁sexual ▁m atur ity ▁and ▁twice ▁as ▁long ▁when ▁fully ▁grown . ▁In ▁the ▁bre eding ▁season , ▁males ▁and ▁females ▁have ▁the ▁names ake ▁red ▁fins , ▁but ▁males ▁( which ▁are ▁on ▁average ▁a ▁bit ▁larger ) ▁also ▁have ▁nu pt ial ▁t uber cles ▁as ▁typical ▁for ▁cy pr in ids . ▁ ▁Distribution ▁and ▁e col ogy ▁ ▁It ▁is ▁en demic ▁to ▁the ▁Western ▁Cape ▁Province ▁of ▁South ▁Africa , ▁where ▁it ▁occurs ▁in ▁the ▁Twe e ▁River ▁to ▁just ▁before ▁its ▁confl u ence ▁with ▁the ▁Lee u ▁River , ▁and ▁some ▁trib ut aries ▁of ▁the ▁former ▁– ▁namely ▁the ▁He ks , ▁upper ▁M idd elde ur ▁and ▁upper ▁Su ur v lei ▁R ivers . ▁Some ▁have ▁been ▁introduced ▁to ▁d ams ▁of ▁far ms , ▁but ▁this ▁was ▁too ▁recently ▁to ▁determine ▁whether ▁they ▁th rive ▁or ▁fail ▁in ▁this ▁habitat . ▁ ▁Ad ult s ▁inhab it ▁the ▁deeper ▁po ols ▁in ▁rivers , ▁shelter ed ▁by ▁b ould ers ▁or ▁rip arian ▁trees . ▁Young ▁fish ▁gather ▁in ▁schools ▁near ▁the ▁water ▁surface , ▁associ ating ▁with ▁over h anging ▁rip arian ▁growth , ▁in ▁particular ▁pal m iet