93749
A band of borings or " Gastrochaenolites " left by marine " Lithophaga " bivalve molluscs on three standing marble columns indicated that these columns had remained upright over centuries while the site sank below sea level , then re-emerged .
 Lithophaga
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:
 Lithophaga