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ZebrafishiDanio rerioj

Zebrafish is a teleost species of the cyprinid family in the class of ray-finned fishes (Actinopterygii) The lineage to this species split from that leading to mammals about 450 million years ago Zebrafish is now among the most popular experimental models of vertebrate development from several reasons some of which are shown below;

1) Fertilization and subsequent embryonic development take place externally in large clutches.
2) Embryos are completely transparent, making the visualization of organ formation within living embryos
3) Development is so rapid that all common vertebrate specific body features including the central nervous system are formed within 2 days.
4) Embryos are large enough for a variety of experimental manipulation.
5) Identification of novel genes as well as functional analyses of genes is possible employing genetic approaches Indeed, the generation time is relatively short (2-4 months) and the clutch size is sufficiently large (up to 500 eggs from a pair).
6) It is easy to introduce modified genes and to establish transgenic fish, allowing efficient reporter analyses and misexpression experiments
7) Various resources such as genomic sequences, EST data, BAC/PAC libraries, and mutant lines are available.

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