Fish

A fish is any member of a paraphyletic group of organisms that consist of all gill-bearing aquatic craniate animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish, as well as various extinct related groups. Most fish are ectothermic ("cold-blooded"), allowing their body temperatures to vary as ambient temperatures change, though some of the large active swimmers like white shark and tuna can hold a higher core temperature. Fish are abundant in most bodies of water. They can be found in nearly all aquatic environments, from high mountain streams (e.g., char and gudgeon) to the abyssal and even hadal depths of the deepest oceans (e.g., gulpers and anglerfish). With 33,100 described species, fish exhibit greater species diversity than any other group of vertebrates.

Fish are an important resource for humans worldwide, especially as food. Commercial and subsistence fishers hunt fish in wild fisheries (see fishing) or farm them in ponds or in cages in the ocean (see aquaculture). They are also caught by recreational fishers, kept as pets, raised by fishkeepers, and exhibited in public aquaria. Fish have had a role in culture through the ages, serving as deities, religious symbols, and as the subjects of art, books and movies.

For Children (Bartók)

For Children (Hungarian: A Gyermekeknek) is a cycle of short piano pieces composed by Béla Bartók. The collection was originally started in 1908 and completed in 1909, and comprised 85 pieces which were issued in four volumes. Each piece is based on a folk tune, Hungarian in the first two volumes (42 pieces), and Slovakian in the last two (43 pieces). In 1945, Bartók revised the set, removing six pieces which used tunes which had been inaccurately transcribed or found not to be original folk tunes, and substantially changing the harmonisation of a number of others; the cycle, now of 79 pieces, was reissued in two volumes (of 40 and 39 pieces).

The pieces were written as student works, and progress slightly in difficulty through each half of the cycle. However, in modern times, some concert pianists (notably Zoltán Kocsis) have begun including some of them on their recital programs, citing their musical value even apart from their pedagogical origins.

See also

Mikrokosmos