Signs. Body elongated, laterally compressed, glabrous. The coloration of back, sides of body and all fins, except the ventral, zelenovato-grey, almost black. Dorsal fin very short, is located ahead of the pelvic fins. Spiny rays of the pectoral fin serrated on the outer edge. Lower jaw longer than upper. Mouth facing up.
Distribution. Big fish, reaching 5 m length and 300 kg weight, inhabiting rivers and lakes of Europe from the Rhine to the East. To the North of the som is to the South of Finland, South to Asia Minor, the Caspian and Aral seas and flowing into their rivers. No catfish in the rivers of Siberia. There is no com also in England, in the Iberian Peninsula, in France, Italy and Western Greece.
Feature. Soma colour variable, usually olive-green, almost black back, white belly, flanks irregularly shaped spots. Small reed form, inhabiting the southern part of the Aral sea, intensive black. Dorsal fin catfish in a tiny, barely noticeable, no fatty fin, but the anal is very long. Continue reading
Fish enliven the garden pond and justify their presence in it that eat mosquito larvae and other insects. However, the presence of fish in the pond is desirable, but not necessarily, because usually has little effect on the maintenance of the purity of water.
When choosing fish, primarily guided by the size of your pond. If you are not strapped for cash, you probably will want to buy expensive beautiful carps. Unfortunately, these fish are harmful to the plants-oxygenators. Like other species of carp, they need a reservoir with a surface area of not less than 7.5 sq. m. At the other end of the scale are hardy and plain ordinary goldfish and shubunkin that can live in any, even very tiny pond — it is necessary only to ensure that in winter the surface water is not delayed by ice for a long time. Between koi and goldfish is Golden Orff, which required a pond with a surface area of at least 3.5 sq m. Another important consideration is whether will be visible to fish. The most suitable from this point of view fish are ordinary goldfish and more mobile gold Orff, since they always stay at the water surface. Continue reading
In this article I will try to answer the most asked questions aquarists-beginners. So, here we go.
Question: what should be the minimum size of the aquarium?
Answer: 20-30 liters. This volume is enough for two pairs pairs of guppies, and 4 catfish.
Question: which fish is best to have a novice aquarist?
Answer: it is best to start with the same catfish or guppies. These two types can live together and not very demanding environmental conditions. Most importantly – don’t forget to feed the fish once a day and periodically changing the water in the aquarium.
Question: what is best to feed the fish?
Answer: on this question my answer is this – though they are fish, but nevertheless, also like variety. Therefore, alternate feed: one or two days feed dry food, then one day feed live food. Continue reading