Best Answer
It could be a small sea cucumber, or if not it%26#039;s definitely a sea squirt, fits all your characteristics. It%26#039;s also called a Tunicate / Urochordata Their kind of like a sponge but not, they function similarly.@hb babe
Those are called barnacles and they wouldn%26#039;t really be able to attach themselves to a jelly fish. I have great interest in Marine Biology.
Other Answers (2)
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a jellyfish....?
the shells were prob just from the sand or one of those wittle tiny animals that stick onto marine animals.. i tottally forgot what u call it :( hehehe sorry :D IDK :D -
Do you have pictures? Maybe that can clear some things up a bit.
