Thalassius may refer to:
*
Thalassius (spider)
''Nilus'' is a genus of nursery web spiders that was first described by Octavius Pickard-Cambridge in 1876.
Species
it contains eighteen species, found only in Africa, Asia, and India:
*'' Nilus albocinctus'' (Doleschall, 1859) – India to Ph ...
, a synonym of ''Nilus'', a genus of nursery web spiders
*
Saint Thalassius, a 5th-century Syrian hermit
{{disambiguation