During the spring, the endangered Salt Creek pupfish males set up territories in Salt Creek as if flows from a spring south to the below sea level section of Death Valley National Park. The pupfish are considered the remnants of fish that once inhabited Lake Manly which filled what is now Death Valley during the last ice age. As the water level receded as the ice age ended, the water became saltier and now only a few springs persist and provide the only habitat for this species. Besides the saltiness, this creek experiences flash floods, nearly drying out, and temperatures from near freezing to over 40°C. (104°F.)
This image was taken by hiking along the boardwalk of the Salt Creek Interpretive Trail, a short turnoff from Highway 190, between Stovepipe Wells and Furnace Creek, the two main developed areas within Death Valley. Rick got down on his belly and waited for a male to swim near the shore to get this shot. You can tell it's a male because of how colorful the front is and by the bluish dorsal fin. Females are better camoflouged and blend in with the grainy creek bottom.
Remember, it's not just a picture, it's a story!