Verified answer

Je n'ai rien attrapé

Its an action that its finish!

figure out the meaning of the sentence

"She caught six big fish, but me, I didn't catch any!"

First, the two clauses occur AT THE SAME TIME, that's your biggest indicator

Second, "i did not catch".... I did catch, being a translation of the passé composé

therefore

Je n'ai attrapé rien :)

luckx :)

Try wikipedia or Rosettastone.