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Reply. Hello again. Thank you for your emails. I enjoy reading every one of your emails, and I want to compliment you on your concern for your
fish's well being.
I wish I could just somehow tell you that your Piranhas were the such-and-such subspecies of a particular species of a certain species, but I can't. I usually can't exactly
identify the fish in my own aquariums.
Your Piranhas may have come from a slightly different location than some other Piranhas, and it might not be clear to a scientist right there in the jungle, whether your
Piranhas are a new subspecies or even a new species of Piranha.
To make things even more confusing is the fact that the scientists change their minds from time to time, as they obtain new facts.
By the way, Silver Dollars are rather closely related to Piranhas, and sometimes it is difficult to distinguish them from Piranhas. Piranhas often arrive as stowaways in
shipments of wild Silver Dollars, so both Piranhas and silver Dollars probably come from the same waters.
Today I was looking at some dogs in my neighborhood, and I thought, "Dang, if I didn't know for sure that they were all dogs, and that they are all the same species, then
I might wonder if they were subspecies of one species or even different species." Some of the dogs looked much different that some of the other dogs.
Many years ago my brother and I were frustrated by a similar situation, when we were importing wild fish from Lake Malawi, every shipment had some fish from a new location in
the lake, that might be many miles from the locations that we had previously gotten fish from, and the new fish didn't look quite the same as the previous fish. We were confounded by an
expanding number of unidentified species and subspecies.
Then one day, after many years, all this frustration just evaporated out of my mind. I decided that what I wanted to do was take the best care of the fish that I had in my
aquariums. I would do my best to accurately identify them, but I wouldn't be frustrated if I couldn't identify them, because identifying them was just beyond my ability to figure out exactly
what species I was looking at.
I also realized that if I came close to identifying the new fish, then I could start by giving it the same care as a closely related fish that I knew about. In this way I was
able to give most fish very good care, and that was really my goal. It was not my real goal to know the exact scientific name of every fish. Though I am not against the attempt by scientists to
name are catalog all the species.
For example, most of the Piranhas seem to require about the same care. When we imported some Wimple's Piranhas, we noticed that they looked quite different from the other
Piranhas we'd previously imported, and the behavior of the Wimple's Piranhas was quite different too. It turned out that the Wimple's Piranhas needed a different sort of care. But I
didn't need to know that in advance, because I could guess it might be true just from looking at them and seeing that they looked and acted quite different.
I hope you get my point. I'm not trying to be unfriendly or brush your question off. I'm just trying to tell you how I deal with this situation of not ever really quite knowing
the exact name of some of the fish in my aquariums. But I am more determined and more focused on giving all my fish the best care that I can give them, suing what I do know about them and
their close relatives.
I recommend that you try feeding your Piranhas some pieces of white fish that you can often buy in the super market for human consumption. Here is a trick. Don't feed your
Piranhas for a day. It won't really hurt them. Their metabolism is slower than ours.
On the second day they'll be real hungry, then put a small piece of the white fish in their aquarium. Carefully watch your Piranhas. They will probably eat the white fish. If
they don't eat it, then take it out of the aquarium with a small net, and a couple of days later repeat this whole process. I predict they will eventually eat the white fish. The Piranhas in the
small video on this web site had just finished eating a large amount of white fish, when I filmed them. Click
here to see
them in the short video now.
Now about your Plecostomus. I think you have good intuition about the light. Most Pleco. are nocturnal and don't enjoy lots of light. So your new Pleco. may be feeling some
stress from being exposed to too much light. Four to seven hours of light each day is too much light for a Pleco.
Generally I recommend that most people turn their aquarium light on for a while in the morning, when feeding their fish, so they can carefully observe their fish, and do the
same in the evening. Have the light on for a total of an hour or two a day, and always be sure that all your fish have several darkish places to hide, where they can go to relax.
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