After a night spent feeding in the surface layers of the water column, the lanternfish begin to descend back into the lightless depths and are gone by daybreak.
Drilling in lightless oceanic depths and transporting the produces back to storage systems to the surface requires tons of special equipment and technological expertise.
The sins in question are never mentioned explicitly, however the imagery of the song (the lightless night, no faith, no love) suggests that they are serious.
