I run into this old fellow every once in a while. He’s a Chinese Softshell Turtle, native to China, Vietnam, and a few other places. They were supposedly introduced to Hawaii in the 1850s by Chinese immigrants who arrived to work the sugar cane plantations then branched out into farming and commerce.
They’re considered a delicacy and are now endangered in their homelands, so the population in Hawaii may ensure survival of the species. I try not to bother him.