IUCN threat status:

Least Concern (LC)

Comprehensive Description

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Description

This animal looks like earthworm at first glance. The eyes are minute, without lids, and are buried below the skin. The animals have a sensory tentacle between the eye and nostril on each side of the body. Along the length of the body there are about 360 cutaneous ring-like folds. The body coloration is brownish-black above, with a yellow, longitudinal band on each side running down the length of the body. The larvae are completely aquatic and have a short tail with a thin laterally compressed fin that extends from the body of the tail dorsally; it curves ventrally around the tip of the tail. The larvae have what appears to be a gill slit, called the gill spiraculum--a small chamber that encompasses the area where three gills are attached. There is a lateral line on both sides of the head and neck that serves as a sense organ for water movements.

Please note that the map we provide only covers distributions in China, but they also occur in Vietnam.

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