(Siokunichthys samoensis) is a species of pipefish belonging to the family Syngnathidae, which includes seahorses and pipefish. They are found in the Indo-Pacific region, particularly in Samoa, Fiji, and Tonga, where they inhabit shallow coastal waters and coral reefs.

Samoan Pipefish are relatively small, typically measuring up to 7 cm in length. They have a long, slender body with a snout that is slightly curved and elongated into a tube-like structure. The tail is prehensile, which means it is adapted for grasping objects, and can be used to anchor the pipefish to the substrate. The coloration of the Samoan Pipefish can vary depending on their habitat, but they are typically tan or brown with a series of dark bars along their body.

Like other pipefish, the Samoan Pipefish feeds on small crustaceans and other tiny marine invertebrates. They use their elongated snout to suck in food, which they then swallow whole. Samoan Pipefish are not typically kept in captivity due to their specialized feeding habits and the difficulty in providing them with the appropriate diet.

Samoan Pipefish are relatively solitary animals and are not known for forming large schools or social groups. They are generally found in pairs or small groups, with males carrying eggs in a brood pouch located on their ventral surface. This is a unique trait of the Syngnathidae family, with males being responsible for carrying and caring for the eggs until they hatch.

Overall, the Samoan Pipefish is a fascinating species that is an important part of the marine ecosystem. While they are not commonly seen by humans due to their small size and cryptic behavior, they play an important role in the food web and are an integral part of coral reef ecosystems.