▁ 1 8 9 7 ▁ ▁Further ▁reading ▁ ▁Scott , ▁Peter ▁( 1 9 9 7 ): ▁Live b ear ing ▁Fish es , ▁T etra ▁Press , ▁ ▁References ▁ ▁Category : N om or ham ph us ▁Category : Z en arch opter idae ▁Category : Live - b ear ing ▁fish ▁Category : V iv ip ar ous ▁fish ▁Category : F ish keep ing <0x0A> </s> ▁Mare k ▁Sit nik ▁( born ▁April ▁ 2 0 , ▁ 1 9 7 5 ▁in ▁O ls zt yn ) ▁is ▁a ▁Polish ▁former ▁Gre co - R oman ▁wrest ler , ▁who ▁competed ▁in ▁the ▁men ' s ▁heavy weight ▁category . ▁Sit nik ▁won ▁silver ▁med als ▁in ▁the ▁ 9 0 - kg ▁division ▁at ▁both ▁the ▁ 1 9 9 3 ▁and ▁ 1 9 9 4 ▁European ▁Junior ▁Championships , ▁and ▁later ▁competed ▁in ▁two ▁Olympic ▁Games ▁( 2 0 0 0 ▁and ▁ 2 0 0 4 ). ▁Through out ▁his ▁sport ing ▁career , ▁Sit nik ▁trained ▁at ▁Ś lą sk ▁Wrestling ▁Club ▁in ▁W roc ław , ▁under ▁his ▁personal ▁coach ▁and ▁ment or ▁Jer zy ▁Ad ame k . ▁ ▁Sit nik ▁made ▁his ▁official ▁debut ▁at ▁the ▁ 2 0 0 0 ▁Summer ▁Olympics ▁in ▁Sydney , ▁compet ing ▁in ▁the ▁men ' s ▁super ▁heavy weight ▁division ▁( 1 3 0 ▁kg ). ▁Sit nik ▁delivered ▁a ▁medi oc re ▁effort ▁inside ▁the ▁ring ▁after ▁losing ▁out ▁three ▁straight