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Environment Sketches by  Katya Gudkina

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Metabaron by  Pablo Dominguez

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This is going to sound insane, but how do octopuses not sustain brain damage from squeezing into tight spaces if they have no formal skeletons? Or heart damage? If they have a cartilage casing for their major organs, how is it strong enough to protect them while being flexible enough to let them be so squished and tiny.

It’s not insane – it’s a very good question! I (page mod) didn’t know the answer, so I reached out to Dr. Michael Vecchione, a cephalopod expert with NOAA Fisheries and the Smithsonian Institution. Here’s what he had to say:

Cephalopods do have a cartilaginous structure that provides some protection for the brain. It is flexible and is stronger in some species than in others, but certainly not as strong as a rigid skeletal skull. The other major organs (e.g., heart, gills, digestive system) of an octopod don’t have any such protection. If you watch one when it is squeezing through a tight space, you will see that it does so slowly and carefully.

So in other words, a cartilaginous structure protects the brain a bit, but mostly an octopus’s other organs are just squishy. So going through a tight space requires lots of and lots of care!

[GIF description: An octopus squeezes under a shelf of coral carrying a meal.]

Have other questions for us? Let us know and we’ll do our best to track down an answer!

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hey this is a test of the theme (pls ignore)

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