Some year, some month, some day. Some sea area. 200 meters below sea level. Twilight zone.
In that depth underwater, the sun was as dark as dusk.
Looking down, there was a dark abyss. Looking up, the top was like just after sunset: that short moment of blue sky right before the sky completely darkened.
What was really different from the real sky was that there were no tired birds returning to the forest, and occasionally there would be a streamline shadow swimming at a high speed overhead––a large shark in shallow water.
The depth was beyond the reach of at least half of the marine life, but in the faint light, there were still some things quietly moving.
Hu—
A shadow swam at a very high speed. Its body reflected a dim, silver light. Very few things could swim at this kind of speed in the sea.
