Fjordia browni is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Flabellinidae.

It is a fairly common species found in exposed sites from northern France to Norway.

[3] This Fjordia has a narrow body and cerata in well defined clusters.

The cerata have a broad band of white pigment at the tip.

[4] The diet of this species is a hydroid, Tubularia indivisa.