Ferry Prices to Ibiza - August



-From Valencaia to Ibiza, I guess it is the shortest distance, right?
-I checked Trasmediterranea prices, roundtrip is like 200euros, am I making a mistake in my search in their web site, I checked Robo (MOD)'s reply on ferry prices, he was talking about prices like 36-44 euros, which makes around 90euromax...is it because August is high season...please tell me this is not true!

Are there any other ferries you recommend, cheaper ones? (that takes 3hours approx, not the slow ferries)