Goniobranchus sinensis is a species of colourful sea slug, a dorid nudibranch, a marine gastropod mollusc in the family Chromodorididae.
Goniobranchus sinensis is a chromodorid nudibranch with a semi-translucent white mantle and coloured margin. In this species there is a yellow band, then a red marginal band with a narrow opaque white band at the very edge of the mantle. The rhinophores and gills are cherry red. The body reaches a length of 20 mm.
