I have found in my diving experience fish that are not nocturnal get sluggish at night you can literally swim up and grab a hold of them so a large catfish could very easily eat a large bass while it is sluggish
Night bass tournaments are common around here in summer. Bass seem to be most active between dusk and early morning twilight, not so much in bright sunshine, at least in these parts. Bluegill, and carp, not active at night, sluggish.
