They go up to 60 on our version. Cap is supposed to be 200, but Nutaku lowered it because of everyone complaining during the first EG which even the whales couldn't kill because the game was so new. They just never bothered raising the cap back to where it belongs after people started getting to the point where it'd be possible to kill them.

Now add the double edge what means to add a whale. If you want to get rewards ok, but to rank this means avoiding them.