I never gave much thought to what goes on under the water at spawning time especially for pike. I really found this video interesting although maybe a bit long.
https://www.youtube.com/watch?v=DQ1aAbdoauw&feature=youtu.be&fbclid=IwAR1LP8agxGgpx5JmPzWirez0UBpio2MhGonF5QI4rhyRgUeFSRUN6PEKBGw