In the principal's room of the castle tower academy, the principal, Hu Lao, and the black-clothed man who appeared at the beginning all stood by the window and looked out of nowhere.

"Elder Hu, you said that it would be a little too hasty to let them go to the outer regions so early, or to the island without roots?" The principal seemed to be a little worried, in November, the weather in the outer regions is changeable, if there is really any problem, even Elder Hu may not be able to arrive in time.

Hu Lao smiled, and his eyebrows under the hood soothed: "Don't worry, principal, although there has been some wind and rain these days, but the night is full of moon, and there is a little fat, so there is no problem." ”

"Besides, Xiao Linzi has never shown his strength since he was promoted to the D rank, and he can see what he can do when he encounters a little wind and waves?" Hu Lao thought of the battle between Lin Ziyue and the second daughter that day, although it seemed that each had its own merits, Lin Ziyue might be a better player, but in fact, Lin Ziyue still had more than enough.

Hearing this, the man in black also nodded: "Actually, I'm also quite curious, how strong can Buqing's apprentice grandson be in the D rank with this kind of cultivation?"

The principal left the window and sat back in his seat: "It's hard to say how strong it is, after all, this kid's mental power has broken through the D-level not long ago, and he asked Glass about the natural elements that day, so I don't know if he can find the advantages of the natural elements in the sea area." ”

Back in the outer land, in the wooden house on the island, after a few people cleaned up the seabirds, they simply returned to the seashore, but at this time they had changed into light clothes.

The four of the Xiao sisters and the two sons of the Yue Xing family were wearing only a set of underwear, and took out a small silver-white ball on the beach, pinched it in the palm of their hand, only to hear a crisp sound, the silver-white ball in their hands shattered, and turned into a set of polymer close-fitting underwater work clothes, covering everything except the face.

"What is this?" Helsing was a little surprised, it had been nearly half a year since he came to the castle tower from the Outlands, and during that time, human technology had repeatedly refreshed his opinion.

"The underwater work suit polymerized by hydrophobic polymers should be a product of the earth and planet fifty years ago, which can allow the human body to ignore water pressure and resistance, but cannot achieve underwater internal circulation. But why do you two have it too?" Lin Ziyue explained to Helsing, but looked at Muji and Monette with some puzzlement.

"This... We bought it when we first arrived on Earth Star to go to the artificial sea. Muji said.

Nowadays, most of the oceans of the Earth Star are in the outer realm, and only the three domains have a sea area of several hundred square kilometers directly adjacent to the sea, and they are separated from the outer regions for safety, so it is understandable that the two of them think that it is an artificial sea.

The four of them walked a few steps into the water, and they did not have the jerky feeling of hiking in the water before, and they also isolated the somewhat cold sea water to a certain extent.

Walking in front of everyone, Lin Ziyue separated a transparent bubble to wrap his mouth and nose, until he walked in front of Li Gui, and he shook his head and refused: "Brother Ziyue, you don't have to worry about me in the water." He lifted his feet and walked into the sea, without even changing his clothes.

Seeing Li Gui entering the sea, others followed one after another.

The bubbles before the mouth and nose did not disappear after entering the water, and they still rhythmized regularly as everyone breathed: "Linzi, what kind of ability is this?" Helin even pinched it, and the bubble did not burst.

"It shouldn't be an ability, this is what I thought of on a whim yesterday at the beach, the wind attribute plus the wood attribute is a very simple application, but I didn't expect it to work. ”

Lin Ziyue's idea is not unreasonable, this is actually a prototype of the C-level ability snorkeling technique, which uses the similar principle of the levitation technique to form an internally circulating compressed air balloon, and converts oxygen with wood elements.

"This bubble can last for an hour, so every hour we need to go to the surface to refill. "In addition to the water element, there is also a small amount of light, fire and wood in the seawater, and there is almost no shadow of other elements.

After roughly judging the endurance time, everyone also got underwater.

After all, it is the body of Tianshui, and Li Gui's way of traveling in the water is a little different from everyone else, his body surface is covered by a layer of crystal blue water element, and he actually flies and moves in the water like a jumping fish.

"Little ghost, don't you need to breathe?" Xiao Tunan was still a little worried.

Li Gui smiled and spit out a bubble: "Sister Tunan, the special training that Hu Lao gave me in the half month I left was not done in vain. As he spoke, he swam towards the deeper sea, and pulled a waterline behind him: "I'll help you explore the way, and you follow me." ”

It is located in an outer region and has not been active for hundreds of years, so the water is clear, the sunlight can easily reach 100 meters below, and the crowd parades in the sea is enough to see everything in front of them.

All kinds of sea fish were swimming in the distance of everyone, and there were even more daring ones who swam ten meters in front of a few people.

At a glance, they were all ordinary sea fish, and a few people didn't think much about it, but the huge number of fish still shocked a few people.

Even Lin Ziyue, who has specialized in learning about the biology of the Earth Star, could not name every group of fish, some were only the size of a thumb, and some were much larger than the stone crab.

Unconsciously, half an hour passed, and when everyone was still dizzying at the magnificent fish beside him, Li Hui floated straight up from the deep sea under the feet of several people: "Run!

Before a few people could react, they were controlled by Li Gui to move faster in the direction farther away from the island, and he kept muttering: "Fish! What a big fish! Tiger Shark !!"

As soon as Lin Ziyue wanted to ask, a gradually enlarged black shadow appeared in the eyes of several people.

The fish swimming in the sea didn't seem to notice anything unusual, but in the next second, a giant mouth that was more than five meters tall swallowed countless fish into their mouths.

“... This... Is this a tiger shark? Why is it so big?!" the crowd exclaimed.

In Hu Lao's crystal card, the tiger shark was only five meters in size, and at this time, the body that appeared in front of several people was twenty meters away, gray-brown, and its body was covered with the same markings as the tiger.

When the countless colorful sea fish were swallowed by the tiger shark, it moved its eyes to glance at the direction of several people, and seemed to feel that the target of the few people above was too small, and the energy it could obtain was not as much as it consumed by opening its mouth, so it ignored a few people and swam towards other fish in the distance.

The bubbles in front of everyone were almost exhausted, so they each surfaced, gasping for breath.

"Is there really an ordinary beast that can grow to such a size? Are you sure this is not a strange beast?" the two Moon and Star who were attached to the sea looked at Lin Ziyue and Hai Xin and asked.

"Not really, it doesn't have the slightest elemental fluctuations on it, and you can see that when it hunts fish in the water, it only uses his body. Lin Ziyue shook his head, helped everyone change the bubbles on their mouths and said, "Since it didn't deliberately attack us just now, let's keep our distance and take a look, maybe there will be other discoveries." ”

As he spoke, Lin Ziyue reversed his body and swam towards the water.

The others followed, but no one noticed that at the end of the distant horizon, the sea breeze was suddenly rolling up dense clouds.

The speed of the tiger shark in the water is not slow, but after all, it is too large, and it only took a few people to catch up with it after changing their breath.

And this time, everyone discovered the goal that Hu Lao gave them.

Previously, above the tiger shark, they only saw its full appearance, but now they followed it from a distance and everyone found that under and around the tiger shark twenty meters away, there were five tiger sharks of normal size.

There is a clear division of labor between them, and the normal tiger shark is slightly faster, and will disperse in advance to drive the sea fish to a certain range for the giant tiger shark to easily prey.

After eating, the giant tiger shark will also spit out some unswallowed marine fish from its mouth for normal tiger sharks to eat.

The range of tiger sharks is generally in the sea at depths of 50 to 100 meters, and the size of marine fish at this depth is generally much larger than the surface area.

As if a new discovery, the tiger sharks continued to dive from the 20-meter depth they encountered at the beginning to nearly 80 meters deep.

The position where they are now is only 100 meters away from the island, and there are sedimentary rock layers in the sea that make up the island, and the water depth is not much or less than 100 meters, and now at the depth, several people can already vaguely see the seabed on the shore.

Countless corals and seaweeds bask in the sunlight at the bottom of the sea.

After the previous feeding, the five tiger sharks finally sank to the bottom of the sea, floating with the current.

A few people went around the side of the giant tiger shark only to find that there was a cliff on the bottom of the sea not far from the bottom of the sea, and under the cliff was a darkness that sunlight could not reach.

"No matter the big ones, how about leading the small ones away and solving them one by one?" Looking at the tiger shark that slowed down, Lin Ziyue had a plan, it stands to reason that with the size of a giant tiger shark, even ordinary swimming will consume a lot of physical strength, and it will take time to digest after a meal, so it will give a few people a chance.

"Although the ordinary tiger shark is huge, it is not a strange beast after all, and it should not be difficult for a few people to deal with it together. Lin Ziyue glanced at the few people around him: "You two sisters are with Anna, Muji Monette is with Xu Zhi, you are with Haixin, and I am with Lao Bai." ”

After estimating the bubbles before his mouth and nose, Lin Ziyue said: "Oxygen can still be supplied for half an hour, this time should be enough, but for insurance, it will take twenty-five minutes at most, if it can't be solved, then immediately get rid of the tiger shark and float to the surface." ”

As he spoke, Lin Ziyue swiped his fingers, and a crystal blue bracelet was fastened on everyone's wrist along with his movements: "This is a water elemental aggregation ring, the duration is about twenty minutes, when the bracelet dissipates, pay attention to the battle." ”

Lin Ziyue turned around, looked at the behemoth that had completely stopped moving, and the four ordinary tiger sharks cruising beside it, and said in a deep voice: "After killing the tiger shark, remember to pull out the special diamond-shaped teeth in its mouth, just now, do it!"

With an order, everyone dispersed towards the four tiger sharks.