For swimming with fish, should it be "nager avec les poissons", or "nager avec du poissons"? I cheated during the test (oops) and "avec du poission" was the answer google provided me. The system approves it but in the final article it says "avec les poissons".... what is the difference?
Also, can it be "J'ai des cheveux longs et ondulés" instead of "les"?