Range and natural history
Its life has two sharply different phases. Larvae filter food from the water while living in bottom mud, remaining in that stage for at least four years. Adults stop feeding, stay in streams, reproduce and then die. The eel-shaped body should not be mistaken for evidence that it is an eel.
The original adults measured about 18–23 centimeters. Identification uses details of the oral disc, teeth and body segments, rather than a single color mark. The limited published locality information should be read as the known record, rather than proof of a surveyed absence everywhere else.
Sources: Entosphenus folletti species summary
