Glowing Hatchet Fish

The eyes of marine creatures are mostly big and upwards allowing
them to see other beings passing from above.
By this way, enemies that look from bottom to top can immediately
distinguish the dark shadow of a being on the floor of natural light
coming from the sea surface.
This hatchet fish you see is tremendously equipped against its
enemies in dark waters.
It lives at depths between 200 meters and 1000 meters and displays
perfect camouflage.
When it goes down to the deeps, thanks to its slim and flat bodily
structure, it is difficult to distinguish it.
Its silver skin acts like a mirror and reflects the appearance of
the water, so it becomes almost invisible when it goes even deeper.
When it is close to the surface, it uses a different method to hide
itself from its enemies. Because under normal circumstances, every
creature in water appears like a shadow due to the light beams
falling underneath the sea, and therefore it sends an invitation to
the animal that wants to catch it.
Hatchet fish have bioluminescent photosphere limbs that can produce
bio-light. This limb is lined all along the pelvic cavity. These
lights are on at times when it is close to the surface.
Hatchet fish balances these bio-lighters with the light falling down
from the sea surface, and thus it avoids being seen as a shadow
against the light coming from the sea surface and becomes almost
invisible.
Now, it is a very important privilege that these light organs are in
the abdomen region. If these organs were in their backs instead of
their abdomens, the enemies that look at them from above would be
able to easily distinguish them on the dark surface of the sea
deeps.
However, just like it is difficult to distinguish a light bulb
turned on in the daylight, the light emitted by the glowing
creatures towards the right direction make it difficult for them to
be seen.
These perfect characteristics in the hatchet fish is one of the
beauties of our Almighty Lord Who Creates without any preceding
example.
The hatchet fish has possessed these features since the first moment
it was created, a 37-23 million year old hatchet fish fossil is
seen in the picture. It can be clearly seen that the hatchet fish
has not changed for millions of years.