Goniobranchus reticulatus is a species of colourful sea slug or dorid nudibranch, a marine gastropod mollusk in the family Chromodorididae.

[1] It has been widely reported from the Indo-West Pacific Ocean, but many of these records are now believed to be of distinct species.

Very small species, twelve to fifteen lines in length, oval, with low back, and the foot of which exceeds the mantle.

The contour of the gill cavity forms a fairly high projection at the end of the mantle.

[6] A number of similar species are known to occur within the Goniobranchus tinctorius colour group.