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While onboard the RV Investigator in 2017, scientists collected a large sponge, but that wasn’t the only thing they collected. Inside, they found 30 banded sand catsharks (Atelomycterus fasciatus). This was the first time sharks had been seen living in sponges, but it wasn’t the last.

Want to surprise your friends and family? With a bit of practice, you can make this cup cluck like a chicken!

Here’s a seriously crafty construction project to take on! While it’s impossible to make a Menger sponge in real life, give this approximation a go.