57493
For example , in " Obelia " there are feeding individuals , the gastrozooids ; the individuals capable of asexual reproduction only , the gonozooids , blastostyles and free-living or sexually reproducing individuals , the medusae .
 Obelia
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:
 Obelia