bladder worm

English Thesaurus

1. encysted saclike larva of the tapeworm (noun.animal)

hypernym	:	larva,
definition	:	the immature free-living form of most invertebrates and amphibians and fish which at hatching from the egg is fundamentally unlike its parent and must metamorphose (noun.animal)

member meronym	:	phylum platyhelminthes, platyhelminthes,
definition	:	flatworms (noun.animal)