From H2oradio:

When he’s doing his search pattern if he detects the odor that he’s trained to find, which is invasive mussels, he’ll sit down. Then as a handler, I’ll ask him to pinpoint exactly where he found it so he’ll point to it with his nose and then I’ll verify and I’ll look and then he’ll get a reward which is a ball.

The adorable dog’s name is “Hilo”. There are pictures. You will click.