 Generally the jumping spider subfamily Spartaeinae , which includes the genus Portia , cannot discriminate objects at such long distances as the members of subfamilies Salticinae or Lyssomaninae can . However , members of Portia have vision about as acute as the best of the jumping spiders , for example : the salticine Mogrus neglectus can distinguish prey and conspecifics up to 320 millimetres away ( 42 times its own body length ) , while P. fimbriata can distinguish these up to 280 millimetres ( 47 times its own body length ) . The main eyes of a Portia can also identify features of the scenery up to 85 times its own body length , which helps the spider to find detours . : 21 
