. ▁Bar ro ▁Colorado ▁Island , ▁which ▁was ▁reserved ▁for ▁scientific ▁study ▁when ▁the ▁lake ▁was ▁formed ▁and ▁is ▁today ▁operated ▁by ▁the ▁Smith son ian ▁Institution , ▁is ▁the ▁largest ▁island ▁on ▁G at un ▁Lake ▁and ▁ren owned ▁intern ation ally . ▁Many ▁of ▁the ▁most ▁important ▁ground bre aking ▁scientific ▁and ▁bi ological ▁discover ies ▁of ▁the ▁tropical ▁animal ▁and ▁plant ▁kingdom ▁took ▁place ▁here . ▁G at un ▁Lake ▁en comp ass es ▁approximately ▁, ▁a ▁vast ▁tropical ▁e colog ical ▁zone ▁part ▁of ▁the ▁Atlantic ▁Forest ▁Cor rid or . ▁E co - t our ism ▁on ▁G at un ▁Lake ▁has ▁become ▁a ▁valuable ▁industry ▁for ▁Pan am ani ans . ▁ ▁Ang ling ▁is ▁one ▁of ▁the ▁primary ▁recre ational ▁purs uits ▁on ▁G at un ▁Lake . ▁It ▁is ▁believed ▁that ▁the ▁C ich la ▁ple io z ona ▁species ▁of ▁pe ac ock ▁bass ▁was ▁introduced ▁by ▁accident ▁to ▁G at un ▁Lake ▁by ▁a ▁Pan aman ian ▁aqu ar ist ▁and ▁doctor ▁in ▁ 1 9 5 8 . ▁Loc ally ▁called ▁S arg ento , ▁these ▁bass ▁are ▁not ▁a ▁native ▁game ▁fish ▁of ▁Pan ama ▁but ▁origin ate ▁from ▁the ▁Amazon , ▁Rio ▁Neg ro , ▁and ▁Or in oco ▁River ▁bas ins ▁of ▁South ▁America , ▁where ▁they ▁are ▁called ▁T uc an are ▁or ▁Pav on ▁and ▁are ▁considered ▁a ▁premier ▁game ▁fish . ▁Since ▁ 1 9 5 8 , ▁the ▁C ich la ▁ple io z ona