2737
Studies of the fish 's diet shows it is an opportunistic feeder , consuming a variety of aquatic invertebrates , with a considerable percentage of midge larvae .
 midge
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:
 midge