Nymphon signatum, the scarlet sea spider, is a species of sea spider.
Distribution This species is endemic to the South African coast, found exclusively between Cape Point and Port Alfred.Branch, G.M., Branch, M.L, Griffiths, C.L. and Beckley, L.E. 2010. Two Oceans: a guide to the marine life of southern Africa
Description The scarlet sea spider measures 40-50 mm in diameter and features a bright red body with long legs. Both sexes possess a pair of legs adapted for holding the egg mass.
Ecology This species is typically associated with hydroids.
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