Think of going to the Aquarama 2007 so I dropped by its website and to my horror they have a really bad picture on their site.
The most obvious fault with this picture lies in the water level of the tank. If there is a passage way between the 2 tanks so that an "opportunity" is open for the goldfish to upgrade to a bigger tank, the goldfish will soon realize that it can't swim across immediately. The difference in water pressure in the tanks will cause the water in the bigger tank to rush into the smaller tank. Definitely not the steady state water level as depicted in this picture. So this is wrong physically!
For benefit of doubt, let's assume that the goldfish is swimming across the bridge even though water is rushing through the bridge to fill into the smaller tank. I have had many goldfishes in my house and in terms of swimming capabilities, if they took the IPPT for fishes, goldfishes definitely need a lot of remedial training. In addition, their bloated bodies is not aerodynamically shaped hence there will be a lot of drag force acting on it. Goldfish will not be able to swim against the current. I know it because I see my goldfishes struggle to swim against the flow of current in my dad's tank.
Again for benefit of doubt, let's assume that this is an almighty goldfish able to swim like a salmon against the current of flow with ease. And if you paid attention to finer details, you find that the goldfish is leaving behind a trail of bubbles in its path. This is what we call 画蛇添足. Literally means painting feet to a snake drawing. Fishes breathe differently from humans and mammals, when they exhale, they don't leave a trail of bubbles in the sea because the oxygen that taken in is dissolved (in water) in the first place!
Let's assume the artist own some fishes and knew that fishes don't exhale all the bubbles that he drawn. Perhaps he meant that the goldfish left a trail of bubbles because it was too eager to upgrade to a condominium from it's 5 room flat. He must have seen ships moving across water creating turbulent flow hence leaving behind a trail of bubbles. Or simply played to many Super Mario games. To get turbulent flow, the goldfish must be swimming mightily fast (oh wait, this is a super goldfish right?). Even if there is turbulent flow in the water, it is unlikely to cause the dissolved oxygen to form bubbles in such an orderly manner (unless its not water but goldfish in 7 up). Try kicking your feet deep inside the swimming pool and locate the "bubbles" coming out and you will get what I mean.
Once again, poor physics prevail in the mass media.
Maybe this type of photos can be used as the year 3 holiday enrichment assignment. It's fun you know?
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