When we read the price tag on “butterfish”, we don’t always know what we buy, then what under the trade name “butterfish” are hidden very different between fish from the three different families and four genera: two species from the family stromateid – stromateus (Stromateus brasiliensis) and the American butterfish (Peprilus triacanthus) . Australian seriolella (Seriolella brama) from the family centrality, as well as Escolar or gray delicacy mackerel (Lepidocybium flavobrunneum) from the family gimpelevich. Sometimes oil fish sold as toothfish is a much more valuable under the threat of destruction of fish, at least – on the contrary, often these names are given together. Usually trade name brings together related species. Here we have an unusual case – a trade name is formed primarily on the basis of similarity in the taste, although oily fish and have some similarities in appearance and lifestyle. Moreover, this name is not our invention. Perhaps it comes from the U.S. oil fish, which in English is called “butterfish”. Continue reading
Among the modern sharks should first be noted epipelagic planktophagous of being the largest members of the superorder, class, and all living groups participatng animals. These giants feed on similar to baleen whales, filtering thousands of cubic meters of water through a “net launcher”. which has become Horny Gill stamens of these sharks. Remaining in the oral cavity Maso and Munro – plankton (except for especially large objects) and serves as food sharks planktophagous. Just today there are three such shark: giant whale, which the inhabitants of epipelagial, and largemouth tending to mesopelagial, for depths greater than 150 m.
These sharks differ from individuals of other species by a number of morphological features associated with the specifics of the production of food. First of all here should stay on the morphology of the Gill apparatus sharks planktophagous, Except a kind of Gill rakers, they have a very large mouth, largemouth and whale sharks is almost final. Epipelagic sharks-planktology filter huge amounts of water and thus receive the necessary amount of food in places of mass accumulations of planktonic organisms,so the whale and especially of basking sharks clearly feed migration. Continue reading
Recently going to the pet store in the aquarium Department, discovered a large new fish. And among them Chitala of ornate or Indian knife. It is a large fish, a bit unusual for our market.
Silver with round spots, a large, unusual shape! Agree, it has its own charm!
Having admired the Indian with a knife, went further and found some more aquarium fish, of which Chitala of ornate one thing in common! They are all predators! Hopefully, in the store warn customers of the nature of these aquarium fish. Although, in my opinion, better to be aware and not to rely on the vision and the honesty of the seller.
Now, explain why this is important!
Predatory aquarium fish are not uncommon in modern aquariums. Many Amateurs and professionals specially having a predators. But often happens so: inexperienced aquarist begins to suspect that his predatory aquarium live aquarium fish only after a number of other inhabitants of the aquarium are significantly reduced. Continue reading