73631
Some bivalves , including the true oysters , the jewel boxes , the jingle shells , the thorny oysters and the kitten 's paws , cement themselves to stones , rock or larger dead shells .
 thorny oysters
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:
 thorny oysters