Thanks for the tip!But I saw only,that I wrote "inclusive" wrong.Also I noticed a few mistakes by the pictures in the Demo and fixed them.It is correct,that the models from pack 2 has 100 vertices more than the models from pack 1 ! It is because the type of the fishes ( thick body and complex fins).

You need full animated lowpoly-fishes?Look at
http://www.projekt-3d.de/pages/shop2pag.html