ðə fˈɪʃ ɪz ɛndˈeɪndʒɚd, bɪkˈʌz vˈɛɹiəs kəmpˈɛɾɪɾɚz wɜːɹ ˌɪntɹədˈuːst ˌɪntʊ ðə lˈeɪk dˈʊɹɹɪŋ ðə sˈoʊviət pˈiəɹɪəd, ɪŋklˈuːdɪŋ kˈɑːmən wˈaɪtfɪʃ kˈɔːɹɪɡˌoʊnəs lˈævɐɹˌɛɾəs fɹʌm lˈeɪk lædˈoʊɡə, ɡˈoʊldfɪʃ kæɹˈæsɪəs ˈɔːɹæɾəs ænd nˈæɹoʊklˈɔːd kɹˈeɪfɪʃ ɐstˈækəs lˈɛptədˌæktɪləs; ænd bɪkˈʌz ʌv lˈeɪk lˈɛvəl tʃˈeɪndʒ.
The fish is endangered, because various competitors were introduced into the lake during the Soviet period, including common whitefish (Coregonus lavaretus) from Lake Ladoga, goldfish (Carassius auratus) and narrow-clawed crayfish (Astacus leptodactylus); and because of lake level change.