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after which it lays clusters of egg cases that resemble small mats of white to yellow shag carpet , The pelagic veliger larvae ( a larval form common to various marine and fresh-water gastropod and bivalve mollusks ) then hatch , persisting in the water column for 14 to 80 days Imposex is characterized by the development of masculine sexual organs in female individuals as a consequence of exposure to organic tin compounds , such as tributyltin ( TBT ) .
 veliger
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:
 veliger