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One moapa dace swimming in a shallow natural spring habitat with a rocky bottom.

Moapa Dace

The Moapa Dace is olive-yellow on its back and white underneath, with a slender, streamlined body built for swimming in warm spring waters. One of its most distinctive features is a black spot at the base of its tail.
SCIENTIFIC NAME
Moapa coriacea
CLASSIFICATION
Fish
LIFE SPAN
1-4 Years
STATE CONSERVATION STATUS
  • Priority Species
FEDERAL CONSERVATION STATUS
Endangered
GAME STATUS
Non-Game
GAME TYPE
None
One Moapa Dace and one other small fish in a rocky underwater habitat.
One moapa dace swimming in a shallow natural spring habitat with a rocky bottom.
Small group of moapa dace swimming.
  1. Washoe
  2. Humboldt
  3. Pershing
  4. Churchill
  5. Mineral
  6. Lyon
  7. Douglas
  8. Carson City
  9. Storey
  1. Elko
  2. Lander
  3. Eureka
  4. White Pine
  1. Esmeralda
  2. Nye
  3. Lincoln
  4. Clark

Habitat & Range

The Moapa Dace is found exclusively in southern Nevada, inhabiting the upper portions of the Muddy River and the warm springs that feed it. Remarkably, it is the only species in the monotypic genus Moapa, making it truly one of a kind.

  • Rivers and streams
  • Springs and springbrooks

Threats

  • Habitat Loss
  • Invasive Species
  • Predation

The Moapa Dace is a rare, federally endangered cyprinid fish found only in the warm springs and upper reaches of the Muddy River in southern Nevada. Like other desert fishes that inhabit thermal springs, it spawns year-round with a peak in late spring and early summer. Moapa Dace successfully breed in water temperatures of 86–89.6°F and must migrate upstream into thermal tributaries to spawn. They are omnivores, feeding on mayflies, caddisflies, worms, snails, plankton, algae, and bits of plants. While they primarily wait for drifting food to pass by, adults will also search through streambed gravels for meals.

Moapa Dace populations have declined due to habitat loss from groundwater pumping, competition and predation from non-native species, and reduced stream flows. Today, they are listed as endangered under the Endangered Species Act. Ongoing recovery efforts include habitat restoration, removal of invasive fish, and protection of spring flows to ensure their survival.

Fun Facts

The Moapa Dace is a rare species of cyprinid fish, found only in the warm springs and upper reaches of the Muddy River in southern Nevada. If you play the popular video game Animal Crossing, you might recognize the dace as one of the collectible fish!
Small group of moapa dace swimming.