what is an ancient fish?
i saw the section saying ancient fish and well i am new to fish i was wondering what is a ancient fish i have a 55 gal tank with a female jack dempsey bout 3 inches and a 3 inplaco i am looking to add new fish and am getting ready to purchase my daughters a tank of the own
It would refer to fish that were around during prehistoric times, and are still with us today, keeping their same features etc., of eons ago. At least that is what I would think it refers to. In the Tropical fish profiles there is a sub-heading for "ancient fish" so you can read about fish that would fall in that category.
For your daughters a great starter fish is a betta fish (sometimes called Siamese fighting fish) and a 5 gallon aquarium. There is a section here where you can post questions about bettas.
Scientifically speaking ancient fish are the least derived fish currently still around. They comprise the first few orders of Actinopterygii (ray-finned fish) as well as the order of Sarcopterygii (lobe-finned fish). Very few of these fish are actually kept as pets, so this category is mostly a catch-all for unusual fish including gobies and puffers which really don't fit anywhere else. Some of the fish such as gars, bowfin, and bichir actually are scientifically ancient fish.
Yes, on forums like this one a category of "ancient fish" usually means odss and ends that don't quite fit elsewhere, not being catfish, or characins, or anabantids, or whatever. The scientific side is a bit hazy for some of these.
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