Quote:
Originally Posted by naiad
It is hard to get a goldfish tank to work properly. They produce a lot of waste and often the water quality is very poor, causing disease problems. This is partly because they are big and active, and partly because unlike many other fish, they chew their food. This releases food particles and nutrients into the water, feeding algae or bacteria. The algae eat the nutrients and keep the water reasonably clean.
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Goldfish seem to have many amphibious qualities. Chewing is not common in fish (water) or birds (aerial) or most amphibians or snakes. Some frogs have psuedo-teeth they chew with.
Do goldfish have unusual fin bones, perhaps vestigial lobe fins that returned to more ray-like fins?
