Nymphon leptocheles is a species of sea spider first described by Georg Ossian Sars in 1888.

[1][2] The species greatly resembles other members of the genus Nymphon, and species identification from morphological traits alone is therefore a complex task.

[3] The species inhabits the sublittoral zone and occurs amongst hydroids and sea anemones.

N. leptocheles feeds on coelenterates.