Fish Study: Cartesian Diver Sci

 

Admittedly, this experiment took several tries to get it right, but we finally got our divers to bob in the water. After learning that fish have an 'air bladder'; a gas-filled organ that allows bony fish to control buoyancy and avoid expending excess energy in the process of movement through water.

https://www.youtube.com/watch?v=p_bGAJZN04M&t=3s

https://schoolingamonkey.com/diving-fish-science-experiment/