Text and Photos by Hui-Ju Chen

Beneath the interplay of light and shadow, the ocean conceals countless secrets waiting to be discovered. During a routine marine survey across the vast seagrass beds of Dongsha, a tiny figure suddenly caught our attention. After careful searching, we finally found the small creature among the porous coral reef substrate. The Yellow-banded Pipefish (Corythoichthys flavofasciatus) bears brown mottled patterns that provide excellent camouflage. Moving slowly and discreetly along the reef, it quietly searches for small planktonic prey. Unless it suddenly swims, its presence is easily overlooked.

In addition to being commonly observed among the coral reefs surrounding Dongsha Island, the Yellow-banded Pipefish can also be found on atoll reefs several kilometers away, suggesting that its population remains relatively abundant. Between May and June, one may even encounter pregnant males—with noticeably swollen brood pouches—slowly foraging along the reef. The species can reach a maximum length of about 12 centimeters. Though not brightly colored, its keen and expressive eyes leave a lasting impression.

The Yellow-banded Pipefish is widely distributed throughout the Indo-Pacific region. In Taiwan, it can be found in the southern waters, Green Island, Dongsha, and the Nansha Islands. It primarily inhabits shallow reef areas along coasts with abundant algae or live coral, ranging from tidal pools down to depths of about 25 meters. Its diet consists mainly of small zooplankton. (Note 1)
Other pipefish species recorded in Dongsha Atoll National Park include Shih’s Pipefish, Messmate Pipefish, Ringed Pipefish, Banded Pipefish, and Thorny Pipefish. The next time you explore underwater and your gaze is drawn to the dazzling colors of reef fishes, take a closer look—perhaps you will spot the graceful silhouette of this elegant little creature as well.

Note 1: Information sourced from the Taiwan Fish Database.