Black pricklebacks

Xiphister atropurpureus

Black pricklebacks

Xiphister atropurpureus
Other Common Names
Black Spiny Back
Other Common Names
Black Spiny Back

At the Aquarium

Rocky Coast

Appearance

Long, eel-like body that is reddish-brown to black in color and has tiny pectoral fins. The head has three dark bands with bright outlines extending from the eyes. The head has a bluntly rounded snout and large, high-set eyes.

Habitat

In tidepools from the lower limit of the intertidal and subtidally over gravel and rocky areas to shallow subtidal.

Diet

Red and green algae, surfgrass, seaweed, worms, snails, and zooplankton including copepods, crustacean larvae, echinoderm larvae, mysis shrimps.

Life History

These fish are oviparous. A female produces between 500 and 8,000 white or yellow eggs. She lays these as several clumps of eggs that will then be guarded by males under rocks in the intertidal. Each egg mass is between 8 and 20 inches in diameter. At hatching, larvae are between 0.3-0.4 inches long. Eventually fully grow up to 13.75 inches and live up to 15 years.

IUCN Status

Not Evaluated

Ecosystem & Cultural Importance

Black pricklebacks feed their predators including whitespotted greenlings, steller sea lions, minks, and garter snakes.
From San Martin, Baja California, Mexico to western Gulf of Alaska at Kodiak Island
These fish can be observed in tidepools in Oregon.
Can spend up to twenty-four hours out of water by breathing air while staying in moist areas such as under rocks or in seagrass.

Citations & Other Resources

  • Fishes of the Salish Sea
  • Love, Milton S. Certainly more than you want to know about the fishes of the Pacific Coast: a postmodern experience. Really Big Press: Santa Barbara. 2011. 649 pp. ISBN 978-0-9628725-6-3
  • Mexican Fish
  • Reflex Net