Stichaeus

Stichaeus is a genus of marine fish in the family Stichaeidae, commonly known as pricklebacks. The genus includes several species found in the northern Pacific Ocean, and in some cases, the Atlantic Ocean. Pricklebacks are known for their elongated, snake-like bodies, and many species are found in intertidal and subtidal habitats, living amongst rocks, kelp, and other marine vegetation.

Characteristics

Stichaeus species share several common characteristics:

  • Elongated body: Pricklebacks have slender, snake-like bodies with no scales.
  • Small head: The head is small relative to the body size and usually has a pointed snout.
  • Dorsal Fin: They have a long dorsal fin that extends nearly the entire length of their back.
  • Pectoral Fins: They have small, rounded pectoral fins.
  • Ventral Fins: They have small, pelvic fins, sometimes reduced or absent.
  • Coloration: Pricklebacks often exhibit a mottled or striped coloration, blending them well with their rocky habitats.

Habitats and Distribution

Stichaeus species are found in cold, temperate waters of the northern Pacific and Atlantic Oceans. They are commonly found in intertidal and subtidal zones, living among rocks, kelp forests, and other marine vegetation. Some species are also found in deeper waters, up to a few hundred meters.

Diet and Behavior

Pricklebacks are generally carnivorous, feeding on a variety of invertebrates, including crustaceans, polychaetes, and small fish. They are often ambush predators, lying in wait among rocks or kelp to snatch prey that comes within reach.

Reproduction

Pricklebacks typically reproduce by laying eggs, which are usually attached to rocks or other substrates. The males often guard the eggs until they hatch.

Species

There are a number of species in the Stichaeus genus, including:

  • Stichaeus punctatus (Lesser prickleback)
  • Stichaeus grigorjewi
  • Stichaeus australis (Southern prickleback)
  • Stichaeus arcturus (Arctic prickleback)

References