This will negatively impact the trout population, I think

I assume Mariana sauce would go everywhere.

Original: https://what-if.xkcd.com/15/

A 1km bubble is pretty impressive

Does that not create any short lived very exotic physic/particle/pressure situation?

I suppose anything living close to the explosion might find the impact pretty dramatic. The effect on marine life would be comparable with dynamite fishing, but on a much larger scale.