Dr. Alicia Pérez-Porro is more than just a sea sponge expert, she's also a former professional dancer. Check out this video below (as discussed on the podcast) where she dances in an experimental Catalan film while dressed as a giant mussel.
And here's the old British video about sea sponges we joked about in "Sounds of Science."
And finally, here's a pretty amazing visual demonstration of the way that sponges filter the water around them: