Coryphellina is a genus of aeolid nudibranchs in the family Flabellinidae, found in the Indo-West Pacific and the Red Sea. The type species, C. rubrolineata, was described from the Red Sea, feeds on hydroids and is reported as a migrant in the Mediterranean; a 2022 study showed that what had been treated as one widespread species is actually several separate species. It was formerly placed in Flabellina.
The body is narrow, the notal ridge is reduced, discontinuous and broken into several indistinct pieces, the cerata sit on low elevations in several groups, and the rhinophores are densely papillate. In C. rubrolineata there is a pointed tail and thin oral tentacles longer than the rhinophores.
