Why is it called HD?

After downloading the free version I thought Id give the supposedly "HD" one a try. I was hoping the Reef fish (the default for Fish Tank Free) would finally look clearer, but theyre exactly the same as in the free app. The Deep Sea aquarium is crystal clear (the only reason this got 2 stars instead of one), but the rest are very disappointing with fuzzy graphics and boring color schemes. Look elsewhere for a paid aquarium app, or just stick with the free version.

Cruciatus12 about Fish Tank HD