is arlong one of the 7 warlords?

stopped at the fish arc about 50-100 episodes ago.. when they met up after those 2 years

did anything good happen after that? like any good fights where they got serious??
lmk please

Not until 270 so the fights get really good. If all you are interested in is the fights id suggest a different anime.

why

anyone know the opening song for this episode?

http://www.dubbedepisodes.tv/one-piece-episode-52-english-dubbed

in english dub or sub

Yes a lot of good shit happened and a few fights, Doflamingo and Smoker was a short but fun one

is there alot of fillers in this anime like naruto?

Yes

There were a couple. But for these fillers, I actually tried to find them!
Also the first foxy pirate was not a filler, second one was.

foxy priate? hmm dont rmember

im up to the part where they finished getting out of the candles and sanji was pretending to be mr 3.

is it just me or the anime purposely makes the girls look hot by enlarging thier breasts LOL when nami's shirt was burned off after escaping the candle wax, her boobs look bigger than normal...