Ever since I installed OFB the the game seems to decide what quality the textures will be depending on amount of people on lot, size of lot and amount of furnishings (there are probably more). In my game I have all graphics options on high except: 'reflections' are off, objects on a different floor to the one you are on are set to being invisible and the 'smoother/rougher edges' slider is disabled (my graphics card doesn't support it). I noticed that when I put some of the graphics settings to low the textures go back to normal. So maybe the game is also deciding whether fish are visible or not in this same way? I suppose it would be the option for 'Graphic Effects' that would effect this?

I don't see what is wrong with buying the pack even though it only has 60+ items, some 'crappy' CAS stuff (although it depends on taste and I think the stuff is great) and a few walls and floors. It is a choice to buy, it is not forced upon you!