84638
The most successful animal species , in terms of biomass , may well be Antarctic krill , " Euphausia superba " , with a fresh biomass approaching 500 million tonnes , although domestic cattle may also reach these immense figures .
 animal, Antarctic krill
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:
 animal, Antarctic krill