Quote 76
The iridescent bubbles were beautiful. But they were the falsest thing in the sea and the old man loved to see the big sea turtles eating them. The turtles saw them, approached them from the front, then shut their eyes so they were completely carapaced and ate them filaments and all. The old man loved to see the turtles eat them and he loved to walk on them on the beach after a storm and hear them pop when he stepped on them with the horny soles of his feet. (2.43)
What the old man loves and what he hates in the natural world may provide insight into his character.
Quote 77
He loved green turtles and hawk-bills with their elegance and speed and their great value and he had a friendly contempt for the huge, stupid loggerheads, yellow in their armour-plating, strange in their love-making, and happily eating the Portuguese men-of-war with their eyes shut. (2.44)
The old man imposes value and judgment on the creatures of the sea. He has made it his own world.
Quote 78
During the night two porpoises came around the boat and he could hear them rolling and blowing. He could tell the difference between the blowing noise the male made and the sighing blow of the female.
"They are good," he said. "They play and make jokes and love one another. They are our brothers like the flying fish." (2.89-2.90)
That the old man finds friends in the creatures of the ocean makes palpable his isolation from other people.