1629
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: location, person, organization 
Text: {0} 
Answer:
 Obelia