The world's rarest fish more than doubled in Devils Hole
The fall survey counted 137 Devils Hole pupfish, up from 69 a year earlier. Biologists think most hatched in the wild cavern after earthquakes had knocked the numbers down.
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The fall survey counted 137 Devils Hole pupfish, up from 69 a year earlier, SFGATE reported. That is more than double. The pupfish, which live in a single cavern in Death Valley National Park, are described as the world's rarest fish. Biologists think most of the fish in this count hatched in the wild cavern. Earthquakes had earlier knocked the population down. The 137 is the fall count. It shows a rebound from 69, and it is one survey of the fish that live in that water.
For the classroom
Devils Hole pupfish live in one water-filled cavern in Nevada, inside Death Valley National Park, and they are called the world's rarest fish. SFGATE reported that the fall survey counted 137 of them, up from 69 a year earlier. That is more than twice as many. Biologists think most of the fish hatched in the wild cavern. Earthquakes had earlier knocked the numbers down. The 137 is one survey, not a promise the fish will keep climbing.
- Why can a fish that lives in only one pool be harder to protect than a fish that lives in many rivers?
- What is the difference between fish that hatched in the cavern and fish that people added?
- Why would scientists count the same small pool every year?
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