never heard of fishbone.

nautica is kinda sportswear, mostly seen on young males.

gap offers affordable daily wear from underwear to outwear, always has sth on sale, for both genders, and their stuff can be seen everywhere,
esp. in campus. if you want something more chic and formal, try
banana republic, which is belong to same mother company but
targeting to different market. I think the sportswear brand 'old navy' is theirs too.

ninewest's shoes and handbags are quite good, more expensive than gap, mostly for early 20s to middle aged ladies.