▁and ▁O y ap ock ▁bas ins . ▁It ▁is ▁absent ▁from ▁the ▁Rio ▁Neg ro ▁bas in , ▁except ▁the ▁Bran co ▁River , ▁which ▁is ▁inhab ited ▁by ▁both ▁silver ▁and ▁black ▁a row anas . ▁ ▁The ▁silver ▁a row ana ▁occurs ▁in ▁both ▁black - ▁and ▁white water ▁habit ats , ▁including ▁flo oded ▁for ests . ▁ ▁Description ▁This ▁fish ▁has ▁relatively ▁large ▁scales , ▁a ▁long ▁body , ▁and ▁a ▁t aper ed ▁tail , ▁with ▁the ▁d ors al ▁and ▁anal ▁fins ▁extending ▁all ▁the ▁way ▁to ▁the ▁small ▁ca ud al ▁fin , ▁with ▁which ▁they ▁are ▁nearly ▁f used . ▁Its ▁maximum ▁total ▁length ▁is ▁typically ▁considered ▁to ▁be ▁, ▁but ▁there ▁are ▁reports ▁of ▁individuals ▁up ▁to ▁. ▁Un like ▁the ▁black ▁a row ana , ▁the ▁silver ▁a row ana ▁has ▁the ▁same ▁color ing ▁throughout ▁its ▁lif es pan . ▁Ad ult s ▁of ▁the ▁two ▁species ▁are ▁very ▁similar , ▁but ▁can ▁be ▁separated ▁by ▁mer istics . ▁ ▁A row anas ▁are ▁sometimes ▁called ▁' drag on ▁fish ' ▁by ▁aqu ar ists ▁because ▁their ▁sh iny , ▁arm or - like ▁scales ▁and ▁double ▁bar b els ▁are ▁rem in is cent ▁of ▁descri ptions ▁of ▁drag ons ▁in ▁East ▁Asian ▁fol kl ore . ▁ ▁Be havior ▁The ▁species ▁is ▁also ▁called ▁' mon key ▁fish ' ▁because ▁of ▁its ▁ability ▁to ▁jump ▁out ▁of ▁the ▁water ▁and ▁capture ▁its ▁pre y . ▁It ▁usually ▁sw ims