Relicanthus daphneae is a cnidarian which occurs in the depths of the East Pacific Rise and was described in 2006.

While the species is currently recognized as a sea anemone,[1] a phylogenetic study was completed in 2014, in which three genes of mitochondrial DNA and two genes from the nucleus of over a hundred different sea anemones were compared, suggesting that the species instead belongs in a new order.

The specific name daphneae is after Daphne Gail Fautin, "in honor of her contributions to actinarian systematics.

"[3] In December 2019 the American Museum of Natural History announced that research had placed it in a new suborder of Actiniaria, rather than a new order.

[4] R. daphneae has a pink-colored cylindrical body capable of reaching a metre across, with long, thin, whitish tentacles up to two meters in length.