The intensity of a sound describes

The intensity of a sound describes its loudness at a particular distance

Sound intensity is factored by the ear's sensitivity to the particular frequencies contained in a sound

Sound loudness describes the strength of the ear's perception of a sound.

These two points being said, if the ear is more sensitive to a frequency, that sound will be louder to us than sounds at different frequencies that might not be as sensitive to our ears. So, the more intense the sound, the louder it is ;)

Thank you for your question! I hope this helped! Have an amazing day! :D

I’d have to say no because without oxygen in the water the fish would all be dead. so if you want to fish for dead fish, pick the ponds with the lowest oxygen concentrations.