Impulse shouldn't be this close to the shore.
He knows this. He's in immense danger in water this shallow.
But seeing the humans going about their days is such a rare opportunity, that he can't pass it up.
He swims along the shoreline, staying in water that is just deep and dark enough to conceal his form, while he can still see out of the water.
According to Tango, humans don't have great water-vision anyway.
He stops when he finds a wooden pole stuck in the ground. Looking around, he sees tons more of them, and then up, he spots a wooden outcropping that goes a good distance into the water, suspended above it.
He swims past the barnacle-encrusted poles and to one side of the wooden outcropping.
He pokes his head just the tiniest bit out of the water, just enough to see what's going on.
His eyes take a second to adjust to the sharp, unfiltered sunlight, but then he can see humans walking along the wooden outcropping, leaning over the rails and pointing at a pack of harbor seals lounging on a metal thing a few yards away, talking to each other, and some humans with long poles, strings attached and dangling in the water.
He knows what those are. Apparently, they're used to catch fish. He's run into them a few times and they hurt like hell and stick in your skin.
He dives back under the water before he can be spotted, but something else catches his attention.
The outcropping stops a little ways away from here and widens out. There's also a stairs leading from the wooden outcropping down to a smaller platform that sits in the water, where a human is sitting and tossing little pellets into the water for a bunch of fish that are swimming around.
Impulse swims a bit closer to the human, watching in amazement as he feeds and talks to the fish.
He must have gotten a bit too close to the surface, because ripples go out from the top of his head and the human looks over, searching for whatever made the ripples.