Zhang Zi'an remembers very well how 52 hertz surfaced ferociously last time and last time, leaving almost no room for him and the minke whale to evade, but this time it appeared two or three hundred meters away from the boat, and its tail fin slapped lazily on the surface of the water, approaching this side at a slower speed.

Whales generally have poor eyesight, but at this distance you can see at least the general outline of the boat. It must have been both surprised and puzzled as to why the "whale" that could emit the same band of audio as it was so small.

It swam in an arc, as if intending to look around the boat.

Seeing it like this, Zhang Zi'an knew that Shihua's singing voice had worked, and he was no longer the grumpy old brother he used to be...... Or the old lady, but I still can't tell how much of a role it has.

As it approached, he secretly cried out in his heart, for the oppressive feeling of a behemoth approaching at a slow speed was even stronger than the shock caused by its sudden appearance, almost like a train coming at a low speed and he could only stay on the tracks for some reason, hoping that the train would stop in time.

As it got closer, he finally observed some details of its surface.

In the case of whales, its appearance is very unique, and it can even be said to be a little strange, about 25 meters long from head to tail, maybe longer, after all, he has no reference, purely by sight.

Its appearance is close to that of a fin whale, but it is thicker than a fin whale, with a slightly curved head like a blue whale, black baleen and a blue-gray back like a blue whale, but the folded area of the flank is white like a fin whale, and the rest of the flanks are also blue-gray markings like a blue whale.

On top of that, its dorsal fin is so small that it doesn't fit for its size, towering like a fin whale's dorsal fin like a sword, which is why I almost mistook it for a shark just now.

As it swims, it occasionally half-jumps out of the water and falls back into the water, splashing a lot of waves. Zhang Zi'an took the opportunity to observe the features of the underside of its head and neck through a telescope.

First of all, it is certainly not a blue whale, and secondly, although it looks like a fin whale, there are several fin whale signs that are plausible, such as the fin whale's right chin is gray and white, and the left chin is gray and black, as if it has a shaved yin and yang beard, but it is not, the color of its chin is uniform.

The same goes for the color of the baleen of the whale, the fin whale has different colors on both sides of the fin whale, while it is the same.

When it turns sideways, the slightly exposed baleen plate is thinner and not as thick as the blue whale.

Based on the above characteristics, Zhang Zi'an is at least eighty percent sure that it is a hybrid child born by a blue whale and a fin whale, and the remaining two percent must rely on DNA identification to be sure.

Throughout the second half of the 20th century, only 5 blue whales and fin whales were identified, and even if you add the 10 or 20 years of the new century, this number will definitely not exceed 10, and may not even increase at all.

Apparently, the mysterious 52 Hz is the other half-breed that has not been discovered, and the hybrids have caused its unique voice and its loneliness.

In addition, during its swimming, Zhang Zi'an confirmed that it was a female whale.

Cross-species hybridization often means sterility, as is the well-known mule, but he believes that 52 hertz is different, and that it is still possible to become a mother if it meets the right object.

Mules are sterile because horses have 64 chromosomes, while donkeys have 62, and mules born are 63, which are not paired, but blue whales and fin whales both have 22 chromosomes, and the number of chromosomes born to mixed breeds is still 22.

If nothing else, the chromosomes at 52 hertz are paired and fertile.

It's already an adult, so it can't wait to swim over when it hears the sound, is it looking for a mate?

It's a pity it's going to be disappointed, there's only one inflatable boat here.

Zhang Zi sat quietly in the boat, doing everything in slow motion, so as not to panic it with his quick movements.

When 52 Hz appeared, he had turned off Shihua's sound to avoid getting too excited, but left the speakers in the water.

It may be the reason for its poor eyesight, or it may be that it is eager to find out, it swims closer and closer, and even meets Zhang Zi'an's eyes.

Its eyes are different from those of minke whales, with two distinct folds on the upper and lower eyelids, like human double eyelids and eye bags, and the eyeballs are completely blue-black, barely visible whites, like a huge sapphire.

Then, its eyes narrowed slightly, and it inhaled in a heaping breath, and its body sank rapidly, causing the water to disappear from the surface of the sea beyond its body.

Is it gone?

No.

If a drone shoots from directly above at this time, he will see a huge shadow in the blue sea quietly swimming under Zhang Zi'an's boat, as long as it suddenly surfaces, he can experience the feeling of flying.

Zhang Zi'an is also aware of his current situation, and he does not dare to move. He is wearing a life jacket and a lifebuoy at hand, anyway, whales don't eat people, as long as they don't drown, it's easy to say.

It took a dozen seconds for the huge shadow to swim past the assault boat.

It floated to the surface from the other side of the boat and spewed out a mist.

At this time, the wind blew from the land to the ocean, and part of the water mist was blown onto Zhang Zi'an's body, with a strong smell of fish and shrimp.

It swung its pectoral fins, made a semicircular bend, and swam back, this time its eyes were full of anticipation and longing, so intense that they almost overflowed, and even Zhang Zi'an was deeply infected.

Thirty years of solitude have finally been answered.

"Hey!"

Zhang Zi'an waved at it and greeted it with a smile.

"You heard it right, the sound came from my side. He patted the rubber side of the assault boat, "This is my boat, let's say hello to you." ”

52 Hz, apparently not understanding his words, cruised around the boat repeatedly, occasionally diving into the water and swimming past the boat again, as if looking for a non-existent kind.

Because it was slow to find its target, it became more and more anxious, and the range of action became larger and larger, and the waves set off made the boat rise and fall like a roller coaster, although it was not yet to the extent of capsizing, but it was a matter of time before the boat capsized like this.

Zhang Zi'an underestimated its desire for its own kind, and thought that it would leave contentedly after hearing the response, but looking at it like this, it seemed that it would not stop until it achieved its goal.

If it doesn't leave, then he will have to retreat.

When it swam to the front of the assault boat again, he quietly activated the motor, shifted to reverse gear, and tried to back down, retreating towards the shore.

However, it immediately recognized his attempt, and in a hurry pursued him, bypassing the boat and blocking his retreat, not letting him go.