Are sea cucumbers the same as sea slugs...? And do they really breathe through their butts? In this episode The Fact Detectives find out the answers to these questions and more, with Melanie MacKenzie - a marine biologist at Museums Victoria who looks after collections of sea stars and sponges and more .

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And if you have a big Fact Detective question, send it to factdetectives@kinderling.com.au. 

A Kinderling co-production with Museums Victoria.