Eubranchus rubeolus is a species of small sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Eubranchidae.

This species occurs in southeastern Australia and South Island, New Zealand.

This species was described from Point Lonsdale, Port Phillip Heads, Victoria, Australia.

[1][2] The species has been reported from New Zealand but there are considerable differences between the specimens.

[2][3]