Humans experience the ocean primarily from its surface.
Even today, enormous areas of the deep ocean are difficult to observe continuously. Animals can migrate vertically through hundreds of meters of water every day while remaining almost completely outside ordinary human experience.
Humboldt squid exploit that vertical world.
They can occupy deep water during parts of the day and move upward as conditions change.
From a boat, nothing announces their presence.
The water simply looks black.
Then the lights go on.
And suddenly the darkness is full of animals.
That transformation—from apparent emptiness to intense biological activity—is one of the great psychological shocks of nighttime ocean diving.
The ocean was never empty.
The human simply could not see what was already there.
Bob Cranston Went Looking for a Monster
What he found was more complicated.
He found an animal capable of approaching a diver without hesitation.
An animal strong enough to pull a human through the water.
An animal equipped with arms, tentacles and a powerful beak.
An animal that sometimes eats members of its own species.
Those details justified caution.
But he also found an animal that appeared inquisitive.
One that reacted to resistance.
One whose skin could transform into a moving display of visual information.
One that challenged the boundary between “attack” and investigation.
Cranston’s encounters eventually became part of PBS’s Encountering Sea Monsters, a documentary following his efforts to understand cephalopods rather than simply portray them as terrifying creatures.
That difference matters.
Because perhaps the strangest moment was not when a squid grabbed him.
It was when the squid let go.
The Red Devils Are Still Down There
Long after the stories of nighttime encounters entered documentaries and popular culture, Humboldt squid remain one of the Pacific’s most remarkable predators.
We know far more about them than the fishermen and early divers who watched red shapes emerge beneath their boats.
Yet seeing one underwater remains profoundly different from reading about one.
A photograph freezes the animal.
A scientific description reduces it to measurements.
Neither captures the experience of seeing a large squid accelerate out of black water, spread its arms, change color and close the distance between itself and a diver in seconds.
That is what made Cranston’s dives extraordinary.
He deliberately entered a place where humans have almost none of their normal advantages.
He could not run.
He could not see very far.
He could not know what was approaching outside the reach of his light.
And beneath him could be thousands of feet of open water.
The fishermen had warned him about monsters.
Cranston went down anyway.
What emerged from the darkness certainly looked capable of becoming one.
But after the grabbing, pulling, flashing and frighteningly close encounters, the question changed.
The mystery was no longer simply:
Will the Red Devils attack?
It became something far stranger:
When a Humboldt squid rushes from the darkness, reaches out, grabs a human being—and then appears to wait for his reaction—what exactly is happening inside the mind of the animal holding him?