Dolphin Bay is surrounded by mountains on three sides and faces the sea on one side. It goes from gentle to deep. Before leaving the mountains on both sides, it looks like a small lake.
After leaving the mouth of the bay, the depth of Dolphin Bay will suddenly increase to hundreds of meters.
Although dolphins are good at diving, no matter how many hundred meters they dive, their activity range is mainly concentrated in the shallow sea between thirty and fifty meters.
Therefore, the task range of Bi Fang and Mandy is between ten meters and eighty meters. If you expand it by one circle, you can basically completely capture the behavior of the dolphins.
For this purpose, more than twenty cameras must be installed, which may not sound like a lot, but it is not an easy job.
Radio has extremely huge losses in the medium, so the signal drops very quickly.
The dielectric loss in water is above 30khz, 7500db/km, and can be attenuated by 150db at 20 meters. Even if there is a base station on the water, there will be no signal below 20 meters.
The cameras used by Bi Fang and others this time are all automatically shot, and they will be recycled after everything is over to take out the captured content.
Therefore, the underwater installation is completely different from the previous mountain cameras. Whether the position is correct or not cannot be observed in time. Previously, the camera position could be continuously adjusted through remote command, but now there is no such opportunity.
Since the dolphin fishing season is about to begin, the difficulty of underwater installation will increase exponentially. It is impossible to install and debug repeatedly, and we can only pursue one success.
The degree of this must be controlled by Bifang and Mandy themselves.
Fortunately, before that, both of them had undergone a lot of shooting training with the help of photography assistant Mond, and they could barely be considered half-professional photographers.
After installing the three cameras at a depth of ten meters in the shallow sea, Bifang Bifang and Mandy continued to think about getting closer to the depths.
At twenty or thirty meters, the limit of active sinking had been reached. The world was dark and silent, and Bi Fang could hear the beating of his heart very clearly.
Run away from the animal sounds that automatically appear in your mind. This may be the only sign that you can feel that you are still alive.
Bi Fang silently counted his heartbeat. When it was just like water, his heartbeat was still 60-70 beats per minute, but now it has dropped to 30-40 beats per minute, which is more than double.
The special breathing method can fill Bifang's lungs with ten liters of air, bringing huge upward force, allowing him to float in the water without doing anything, reducing the amount of muscle movement against gravity.
The further down, the more the water pressure squeezes the lungs. At this time, Bifang and Mandy are floating in the water relying on the air in their lungs.
At the same time, the diving reflex will cause the peripheral blood vessels to constrict, causing blood to leave the limbs and flow to the most important organs, the lungs, heart and brain.
And because the blood rushes to the brain, bringing a huge amount of oxygen, as long as nitrogen intoxication does not occur, the diver's brain will be extremely clear at this time.
The more awake I am, the more I feel as if I have entered another world.
Silence, darkness.
Some people say that people don't know half as much about the ocean as they do about the moon.
This is not an exaggeration, because even in 1977, people had already sent astronauts to the moon, but they still naively believed that there were no active life forms in the ocean abyss below 6,000 meters.
There was unspeakable pressure from all directions. Every time I breathed through the breathing valve to expand my chest, it was like doing an oversized hand press.
It was as if I was being held firmly by a giant and squeezed hard.
The equipment brought down in the first wave has been installed. Bi Fang and Mandy were seven or eight meters apart. They pressed the flashlight switch and flashed it a few times. After confirming that everything was completed, they were ready to float up and take out the camera first.
Mandy nodded, stepped on her duck webs, took a deep breath, and was about to float up. Suddenly, a bright light flashed in front of Mandy.
That was Bi Fang pressing the flashlight very quickly.
Emergency signal!
Mandy's mind cleared his thoughts. He had received strict training and had almost no hesitation. He only relied on his body's instinct to twist the direction, but it was still a step too late!
The violently churning water flow was like a waterspout, which hit Mandy's forehead with an irresistible impact.
In an instant, Mandy's eyes turned white, and water poured in from the gaps between her teeth and nostrils. It was real sea water, with a bitter and salty taste.
It's a pity that Mandy can no longer feel it. Under the violent impact, his consciousness has suddenly suspended and he drowned!
When his consciousness died, he could only see clearly a huge ghost head, a sharp mouth full of fangs, a high and protruding forehead, and bulging eyeballs!
No one expected the sudden change. Bifang took out the harpoon from his waist and quickly swam towards Mandy.
A huge black shadow swam past the two of them at an extremely fast speed. The churning water could even sweep up Mandy, who was unconscious and drowning several meters away.
Bi Fang's flashlight couldn't illuminate its figure at all. It was like a ghost, wandering around the two of them.
The shark electric sensor is indeed powerful, but it can only identify the basic size and existence of a creature, and cannot accurately scan the shape of a creature like radar.
It was so fast that it hit Mandy before Bi Fang could react.
Bi Fang swam to Mandy and quickly put the breathing valve on him again, tightening it tightly.
At this time, Mandy's lungs had already been filled with seawater. Bifang came behind him and used the Heimlich maneuver to squeeze Mandy's lungs violently.
At this moment, the lingering ghost appeared within Bi Fang's perception range again, attacking quickly!
Unfortunately, Bifang is not Mandy and cannot be seen in time. He can also clearly sense the arrival of the creature and respond in advance.
Bifang dragged Mandy, kicked on the rock wall, and quickly left his position.
The violent water flow passed over his forehead, and the pressure almost pulled Bifang back to his original position. He wanted to attack with a knife, but the opponent's speed was so fast that he didn't even stab him.
Bi Fang lowered his head and scanned, taking this opportunity to finally see part of the "ghost" clearly!
gt!
Also called Niu Hong Kong Trevally!
An extremely huge cow trevally!
Bi Fang was slightly shocked and held the harpoon tightly in his hand. The Port Trevally is the largest carnivorous fish species in the Trevalidae family and can leap out of the water to prey on seabirds.
The guy in front of me is at least 1.6 meters long! He weighs over 70 kilograms!
A 1.6 meter GT can hunt sharks!
The cow trevally is the bison of the sea, an extremely powerful aquatic beast. Its main features are its steep head and powerful tail.
It is a large coastal migratory fish with a habitat depth between 2 and 80 meters. It is distributed from western South Africa to eastern Hawaii, including northern Japan and southern Australia.
Often found in estuary areas, feeding mainly at night.
It is greedy and strong, and no other creature can threaten it except sharks and humans.
With a muscular torso and oversized paddle-shaped pectoral fins and tail fins, it possesses real strength, explosive power and amazing endurance.
The speed in water can be as high as 60 kilometers per hour, and the human limit record does not even reach 40.
In addition, the Cow Harbor Trevally is ferocious in nature and will catch all the small fish it encounters in the sea area where it is located, and will even catch birds and young turtles staying on the sea surface.
When the cow trevally finds prey, it will hit the prey violently to make it faint or swallow the prey directly.
The most frightening thing is that bull trevally often hunts in groups, so it is very ferocious in grabbing food. It often happens that adult bull trevally swallows young bull trevally by mistake.
Is this guy crazy?
How dare you attack humans?
The cow trevally is extremely ferocious, but not to this extent, right?
The seventy-kilogram cow trevally is already at the same level as humans in terms of weight. It is not common to attack animals of the same level. It may only occur when food is scarce.
etc.
Is it because of the upcoming dolphin fishing season?
Bi Fang guessed this possibility. The arrival of dolphins put the nearby Niugang Trevally into a temporary state of food shortage.
So, there is really a lack of food?
Bi Fang calmed down his heartbeat and tried his best to sense the surrounding environment. Fortunately, there seemed to be only one Niugang trevally nearby.
I don’t know when I arrived at Dolphin Cove and bumped into Bi Fang and Mandy who were installing cameras, and even launched an attack!
The huge impact directly knocked Mandy unconscious, which was caught off guard. This was because Bi Fang reminded her in time. If he hadn't subconsciously twisted his body, the impact might not have been on the hard forehead, but on the fragile back of the head.
At that time, it will not be as simple as fainting, but it may be killed on the spot!
No more.
Bifang took the time to look at the unconscious Mandy. A huge wound appeared on Mandy's forehead, with blood flowing out.
The bull terrier hovering nearby was ready to launch a fatal attack at any time. Bi Fang hugged Mandy tightly with both hands, adjusted the oxygen pressure, turned it to the maximum, and squeezed his lungs again.
A large amount of seawater overflowed from Mandy's mouth. Bifang quickly tightened the breathing valve, and a large amount of oxygen escaped and poured into Mandy's lungs.
The second time, the third time.
Mandy probably never thought in her life that as a diving champion, she would actually drown, and even be rescued from drowning in the sea water.
On the fourth time, the long-awaited Cow Harbor Trevally attacked again!
Bi Fang quickly dodged to avoid it, but holding the heavy Mandy, it was difficult for him to move. When he turned around briefly, he was still hit in the arm.
For a moment, Bi Fang even had the illusion that his arm had been broken, and the blood in his arm was cut off instantly.
Swelling, numbness, pain.
Wave after wave of strange feelings hit my heart.
Even the harpoon in his hand almost fell to the bottom of the sea.
Bi Fang could keenly feel that the impact on his right arm had broken a large number of capillaries, and quickly accumulated into congestion under the skin.
He tried to hold the dagger again, but it was like his arm being pressed down by a nap. When he woke up, it was painful and numb, and he couldn't hold it at all.
No wonder this guy is called a water buffalo.
Really powerful!
Keke on the shore had no idea what was happening in the water. He hid in the dark, not daring to make the slightest sound or light, and carefully snooped around to make sure no one came to discover what they were doing.
The lighthouse not far away is still scanning the sea monotonously.
－－－－－－Digression－－－－－
The curved-billed plover is the only bird whose beak naturally curves to the right.