Greetings for uninvited guests
There is a reef near the island where pearls are produced, it is a profitable business for local owners, and pearls always sell for a high price for jewelry. But there is always a danger for them that someone will decide to steal a few of them. There were buoys all around, and various warning signs were placed on them - [PRIVATE AREA, Trespassers WILL BE PUNISHED]. But who was stopped by easy money in the face of danger?  
One such farm is guarded by an anthropomorphic shark, a mercenary named Dako. His short blue hair almost matched the shade of his body and tail. He sat among the rocks where the observation post was set up. The job was simple, patrol and intercept, the pay was good, the only thing was that the territory was huge, which made him constantly move around looking for thieves.
- At least it wasn't a factory job, there was only the sea and the sea around. But if there was any movement here, it would be nauseating.
On one of these patrols, he noticed a boat near one of the farm's nets. Usually no one is on the farm at this time to harvest, so it was someone else.  As he approached underwater, he noticed intruders searching for oysters and taking out pearls. They are two wolves, a man and a girl. Dako was surprised by the brazenness of both of them, but he was even more surprised that both of them dive naked, wearing only diving goggles. They don't notice the security guard and continue to fish. 
- So much for the adventure, let's see what you guys are up to.
Wanting to deal with the offenders, he watched them for a while. The two wolves were busy working, She was pulling pearls out of oysters and putting them in a bag, He was constantly diving into the depths like a dolphin, and the same mollusks were coming back with him. Considering that the wolf looked stronger, and that he was mostly looking for oysters himself and bringing them to the wolf's boat, he decided to neutralize him first. 
In a very specific way.
- This will be interesting." Dako said in his mind as he swam gently in the water, contemplating his prey, he dove under the water column, approaching. 
The Wolf made a new dive and moved away from the boat, looking for pearls among the algae. The seabed was covered with a small reef, with small waves of fish between them. The bottom was covered with a variety of colors and long seaweed like a forest. The Wolf moved carefully between them, searching for clams attached to the rocks, which he collected in a small net on his hip.  Dako would sneak up on him through the overgrown seaweed while he was out of sight. After collecting a large net of clams, he looked back up to the boat, apparently planning to swim to the top. But this ascent was doomed.  
- "Stop, you dog!" something squeaked in the water near the wolf.
As he approached, Dako jumped out of the algae and rammed the wolf in the back. With a sharp movement, he grabs the wolf's neck from behind and pulls its head back down. The wolf is so surprised that it doesn't have time to recover, only catching a glimpse of a long blue shark's tail out of the corner of its eye.
- What? Where? Who? Oh, you...
With a thud, both of them hit the sandy bottom. The unexpected impact confused the wolf and gave Dako an advantage, there were long and dense seaweed around, which played into the shark's hands. Dako quickly ties his hands with the dense algae around his wrists. The Wolf notices him now and tries to reach him with its fangs and sharp teeth, shouting some curses at his opponent, but the seaweed holds him like an anchor in place. 
His hands were already securely tied, and he was upside down, floundering helplessly in place. He tries to chew his trap out of his hands, but in vain, the dense tissue of the algae sticks in his teeth.  At this time, Dako carefully examines his prey. The naked Wolf, upside down, can only jerk his body and legs awkwardly trying to get out of the trap, while leaving his erect penis out of sight, which attracts the attention of the vicious shark. Dako, with a sadistic smile, swims around his legs from above and swims closer to him. 
- Don't move, dog! I'll be done with you in no time, you won't even realize it," Dako taunted.
He takes a similar position, turning upside down, and looks at the entire front of the wolf's body, then he grabs the wolf's side with one hand and pushes the other between his legs to the wolf's cock. The wolf looks at Dako's satisfied face, surprised and frightened. The shark guy himself continues to smile sadistically as he begins to quickly jerk off his cock, causing the wolf to panic considerably, with each movement of his hand he began to moan with pleasure and lose air bubbles because of it. It's getting harder for the wolf, his lungs are starting to hurt, and his body is getting even more excited about it and making his cock get bigger. Dako enjoys this scene and changes his approach - he swims up behind the wolf and quickly examines him from behind. The wolf was noticeably muscular, his buttocks looked similar, and his balls were squeezed between them. He grabs the wolf's hips from behind and puts his cock against it. The wolf is confused, he looks down at his ass and sees Dako's shark penis rubbing against his own between his legs. He realizes the danger of proceeding and panicked, he nods his head to the side in protest, but to no avail. Dako appreciates this reaction and directs his cock into his ass, making the latter moan either in pain or pleasure. He begins to fuck him, at the same time stimulating the wolf's long and thick cock with his hand. The wolf just moans meekly and keeps releasing the last of his oxygen from his lungs.
He is now in the most horrible situation, helplessly upside down, deep underwater and being fucked, his body torn by the pain in his chest and the pleasure of sex. At the last moment, his body fails him and his lungs instinctively swallow in a rushing stream of water, he begins to drown and swallow water, while helplessly kicking his legs. Dako is almost ready, he cums inside him almost immediately, while the wolf twitches and starts swallowing water non-stop, also releasing his orgasm into the water. Shaking his legs and his cock which spews semen around. After a few seconds, his body became slow, almost stopping all movement and resistance. Dako swims to his face and sees that he has drowned with ecstasy on his face.
But there is still one more problem from above. She is now sitting in the boat.
The wolf girl was worried about her friend's long absence. She pokes and prods at the water surface for a while, but there is no movement. She decides to dive into the water after him and looks around, there was a reef and overgrown algae. With her eyes she scans around and only then screams when she notices a naked wolf upside down, his hands tied by the seaweed leaves. She involuntarily swims toward him, unaware of the danger below. Dako rams her from behind, she sharply tries to cling to him, but the advantage of the sea creature was obvious and he immediately wraps his arms around her body from behind. Once in his arms, she helplessly tries to reach him with her hands and fangs, but in vain. He also does not want to give her the opportunity to resist, he reaches out and starts rubbing her breasts and pussy, forcing her to reduce her resistance with a barely hearable moan.
Under the weight of both of them falling to the bottom, Dako decides to finish the job against her with pleasure. He lays her belly down on the sandy bottom and gently rubs himself behind her. She tries to understand his intentions, whimpering and twitching under him, but immediately realizes what evil thought was in his head. He quickly entered her vagina with his cock, making her give a volley of bubbles from her lips. She tries to throw him away, but he lies down with the weight of his body on her, not allowing her to do so, and goes even deeper into her pussy with his penis. His cock is like a sea wave against the rocks, he starts slamming his hips against her ass, plunging his cock deeper. He involuntarily hugs her breasts and begins to accelerate his movements inside her, increasing her excitement and enjoyment of the process. Faster and faster, he slammed his cock into her pussy, each slam accompanied by moans from both of them, her hair and fur dangling helplessly from the rapid sex, and she just held onto his hands on his chest.
From the lack of air and his constant fucking, her mind starts to break down. She begins to lose her mind more and more in a panic: the threatening situation, the constant stimulation of her breasts as well as her vagina by the cock. She can no longer control herself and begins to slowly swallow water down her throat. Her mind is racing for a way out, but she realizes that she can't escape... Exhausted, she calmly lets Dako finish what he's doing. They both come. He floods her vagina with semen and pulls his cock out of her, gently wanking it off with the last remnants of semen. She, in turn, moans in ecstasy and agony, her pussy cumming, and her body begins to shudder uncontrollably from orgasm. She begins to drown immediately by swallowing water and faints a few seconds later. Her body is now floating underwater next to Dako.
He examines both victims of his prank. The wolf is bobbing upside down with only his penis dangling among the algae. The wolf girl, with a grimace of ecstasy frozen on her face, flounders on the sandy bottom next to him. Danko smiles evilly and is about to swim away, because the job is done. But he quickly changes his mind.
- Hmm... Leave them as a warning, but no boss will be happy with two dead bodies on the farm - the workers will probably be very scared of the discovery. No, no, no, I need to get them out and let the bosses deal with them  
He decides that leaving them here would be a bad idea, but giving them to the employers would be good proof of the booty and his work. He gently picks them both up and drags them to land. They both regain consciousness, but both are already captured, in a prison behind bars, bewildered, trying to recall the image of their attacker, thinking every second to take revenge for his trick.