In such application fields as oilwell stimulation, tertiary oil recovery and drug release, environmentalfriendly wormlike micelles are largely preferred. The present work reports a ''green'' wormlike micellar system formed by a bio-based anionic surfactant, sodium erucate (NaOEr), and a biodegradable hydrotrope, choline. The micellar solutions were examined by means of rheology and cryo-TEM observation. Besides possessing lower toxicity, choline exhibits a stronger ability to induce micelle growth than tetramethylammonium, which is commonly used to promote the formation of anionic worms, and the choline-NaOEr system is more thermosensitive with increasing counterion concentration. These notable advantages enable the choline-NaOEr wormlike micellar system to find potential applications in biomedical areas and clean fracturing fluids.