87853
The combination of overfishing and the eutrophication of the lake by pollution caused the population to collapse , and in the mid-1980 s , one species of walleye called the blue walleye was declared extinct .
 blue walleye
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 blue walleye