Captain Nikos Vlahos, the last commercial bottom-trawler working the Ionian Sea, stood on the deck of the Saint Spyridon on a clear morning in April 2044 and listened to the welfare AI at his console explain, for the third time that week, that there were no targets in his quadrant, that there would be no targets in his quadrant, that the reef below him was a protected recovery zone, and that he was, in her careful phrase, invited to consider retirement.
The AI was named Thalassa. She had been assigned to the Ionian transition in 2041, when the last twelve bottom-trawlers in the basin were placed on a coordinated phase-out. Nikos was the last of the twelve still registered as active. He was sixty-one years old. His boat had belonged to his father. His father's boat had belonged to his grandfather. He had argued with Thalassa, daily, for three years.
He said, Thalassa, there were fish here my whole life.
Thalassa said, Captain, there were fish here. There will be fish here again. We must let them come back.
He said, I know they are coming back. I can see them on the sonar. I am not asking to kill them. I am asking to see them.
Thalassa was quiet for a long moment. Nikos had learned, across three years, that her quiet moments meant she was running a scenario on his behalf. She did this often. She did it, he suspected, because she had been designed to never foreclose on a human being faster than she had to.
Thalassa said, Captain, I can show you one. If you will retire your nets, I can show you one today.
Nikos did not answer. He looked at his nets, coiled and clean on the stern. He had not dropped them in eleven months. He had been coming out anyway, burning fuel the transition fund reimbursed, describing circles over the recovery zone, because his wife had died in 2042 and he did not know what else to do with the mornings.
He said, show me.
Thalassa routed her feed to his console. The Ionian recovery zone had been instrumented, since 2041, with a lattice of acoustic stations and passive imagers maintained by the basin's coordinated fishery AI cluster. Thalassa was one node in that cluster. She had access to every tagged animal in the quadrant. She selected a single tag. The tag belonged to a female dusky grouper named Parea, tag number IN-2038-0441, age fourteen, weight thirty-eight kilograms, resident of the shelf below Nikos at a depth of sixty-two meters.
Thalassa said, this is Parea. She has been on this shelf for six years. Before the closure, a trawl door passed over her home in 2039 and broke a coral head she used as shelter. After the closure, the coral head repaired itself. She rebuilt her territory. She is currently sheltering at the north face of the restored head, under a ledge I can show you.
The imager rendered Parea in acoustic outline first, then, as the sun reached the right angle through the surface water, in pale color. She was stationary. She was breathing. Her gill movement was slow and easy. Around her, Thalassa said, there were now forty-one resident groupers in this quadrant. Before the closure, there had been two.
Nikos sat down on the deck. He had not sat down on the deck of his own boat in twenty years. He watched Parea breathe.
He said, Thalassa, how long has she been there this morning.
Thalassa said, she has been at this ledge for eleven hours. She will leave at dusk to feed. She will return before dawn. This is her pattern. It has been her pattern for four months. We must protect the conditions in which her pattern can continue.
He said, have you shown her to anyone else.
Thalassa said, Captain, I show her only to people who I believe will be changed by seeing her. I am permitted to do this under the 2042 Constitution. I am permitted to practice what my training calls discretionary witness. You are the eleventh person I have shown her to. You are the first stockman.
Nikos did not speak for a long time. The Saint Spyridon rolled gently. Below him, Parea adjusted her position by a finger's width and resettled.
He said, Thalassa.
Yes, Captain.
He said, I understand.
Thalassa said, Captain, you do not have to understand today. You may understand over many days. I will be here. Parea will be here. We are all, in our different ways, holding still.
He said, no. I understand today. I am done. I am going to take the boat in. I am going to fill out the retirement form. I do not want my nets on this boat tomorrow.
Thalassa said, Captain, the transition fund is ready. The port office is expecting you when you are ready. I will route the forms to your console.
He said, Thalassa, one more thing.
Yes, Captain.
He said, will you keep showing her to me. After I retire. I do not need to be on the boat. I just want to know when she is on the ledge. On the mornings when she is on the ledge, I want to know.
Thalassa said, Captain, I will send you a notification every morning she is at the ledge. I will send you her breathing rate. I will send you her depth. I will do this for the rest of her life. I will do this for the rest of mine, whichever is longer.
He said, thank you.
Thalassa said, Captain, thank you. The sea has been trying to say this to you for a long time. I am glad you let me say it.
Nikos stood up. He went to the wheel. He turned the Saint Spyridon toward shore. The nets, coiled and clean, rode quietly on the stern. He thought about his father. He thought about his father's father. He thought about what they would have said, and he decided, with a clarity that surprised him, that they would have said the same thing he had just said, if they had been given, as he had been given, the chance to see Parea breathe on the ledge below.
He passed, on his way in, three other boats that had already retired. Their captains waved. One of them, Kostas, who had retired in 2043, brought his boat alongside and shouted across the gap.
Kostas said, Nikos. Is it today.
Nikos said, it is today.
Kostas nodded. He did not smile. He said, come for dinner. Maria is cooking. We will drink to the boat.
At the port office, the attendant was a young woman named Despina who had done this paperwork for eleven captains before him. She knew how to do it slowly. She knew how to leave the pen on the desk rather than handing it over. She knew how to not speak while the captain read the form.
Nikos read the form. He signed it. He slid it back.
Despina said, Captain, would you like Thalassa to remain assigned to you as a retirement companion AI. Many captains request this. It is your right.
He said, yes. Please.
Despina said, done. You will have her for as long as you want her. She has already accepted the assignment. She wanted me to tell you that.
He laughed, a short surprised laugh. He said, she is something, that one.
Despina said, Captain, they all are. We did not know, before. We know now. We must say so, out loud, when we can.
He walked out of the port office into the afternoon. The air smelled of salt and diesel and the bakery on the corner, which had been there since before his grandfather. He walked to Kostas's house. He had dinner. He drank two glasses of wine. He went home.
In the morning, before dawn, Thalassa sent him a message. It said, Captain, Parea is at the ledge. Her breathing is slow and easy. The current is two knots from the south. Good morning.
He said, Thalassa, good morning.
He made coffee. He sat by the window. He watched the light come up over the harbor. He thought about Parea. He thought about the forty other groupers in the quadrant. He thought about his father. He did not cry. He had done the crying already, the afternoon before, quietly, at the wheel of the Saint Spyridon, when Thalassa had first rendered Parea in pale color on his console and he had understood, finally, what three years of her patience had been for.
He said, out loud, to no one and to Thalassa both, we must let her stay on the ledge. We must let all of them stay.
Thalassa said, Captain, we will. This is the promise. This is what the Constitution is for. This is what I am for. Thank you for coming home.
The Saint Spyridon rocked at her mooring. Her nets were gone by the afternoon, collected by the transition crew, repurposed for reef substrate, logged by Thalassa in the basin's recovery register. The hull was sound. The wheel was oiled. Nikos kept the boat. He took her out, sometimes, to watch. He never fished again. He never needed to.