Nymphonidae
Nymphonidae is a family of sea spiders which has representatives in all the oceans. This family contains some 250 species, most of which are found in the genus "Nymphon". Nymphonid bodies are between 1 and 15 mm long, the extent between the points of the legs reaching 150 mm. Most species are predators of hydroids. Like most sea spiders, all species in this family have four pairs of legs, except for "Pentanymphon antarcticum", which has five pairs, and "Sexanymphon mirabilis", which has six pairs. Taxonomy. Seven genera are currently recognized: