Fish (Beatrice D.S / Xa)

Fish is vertebrata poikilotermik, living in water and having breath with gill. Fish is group of vertebrata which very multifarious with number of species more than 27.000 in the world.In taxonomy, fish pertained group of paraphyletic. usually fish is divided to to become fish without jaw ( class Agnatha, 75 specieses is including lamprey and fish hag), bony fish of gristle ( class Chondrichthyes, 800 specieses is including shark and ray), and the rest pertained bony fish ossified ( class Osteichthyes). Fish in so many vernacular called as iwak, jukut

Fish has kinds of measure, starts from fairish shark whale 14 metre ( 45 ft) finite of stout infantfish which only 7 mm ( about 1/4 inchs). There are some water animal often is considered to be " fish", like whale and mermaid, actually exclusive of as fish.

Detectable fish in most all " pond" king sized water either freshwater, brackish water and also brine at depth varies, near from finite surface some thousand metre below surface. But, lake which too briny like Great Salt Lake cannot take care of fish. There are some fish species conducting to be looked after for on display in aquarium.

Fish is source of important food. Other water animal, like mollusc and krustasea sometime is assumed also as fish when applied as source of food. Catchs fish for eating in number small or sport often is conceived of fishs. Result of arrest of world fish every year its amounts to around 100 million tons. Overfishing is arrest of fish redundantly. This phenomenon is threat for various fish specieses. On 15 Mays 2003, journal Nature reports that any king sized sea fish species has been catched is abundant systematically finite the numbers less than 10% number of of the the year 1950.

1. Ordinary cork or haruan ( Ophiocephalus striatus), form of its body oblong ( length integer), while in part of posterior ( tail jetty, under stomach). Body art of white stomach of chocolate. This fish easy to be found in common water territory like lake, bog and river. Cork fish also able to live in brackish water territory. Including fish carnivora. Its food for example small prawn and fish, water insect, worm, frog, crab. Cork fish easy to be found in Java, Sumatra, Kalimantan and Sulawesi.

2. Toman ( Ophiocephalus micropeltes), long physique and integer. Wide fairish mouth located in tip of nose. Young toman fish of its body colour is red, after adult becomes aquamarine towards purple. Can be reach length 65cm. its life in bog and river, especially floods area. There is in Java, Sumatra Selatan and Kalimantan.