4775
Overall , for several different physiological systems , trout were most disturbed , and goldfish were least disturbed by HEA , helping to explain the differential ammonia tolerance of the three species .
 Chemical: ammonia
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: ammonia