Therefore, they concluded that zebrafish embryos must have inherited the "ticking" Per3 directly from their mothers.

BBC: Body clock 'set before birth'

Dr Laudet and his colleagues identified a version of this gene, Per3, in zebrafish.

BBC: Body clock 'set before birth'

"A plastic plant isn't much interest to a minnow, but a zebrafish will spawn over one, " says Dr. Paull.

WSJ: Birds Do It, Bees Do It, Even Zebrafish Do It��Just Too Little

While many invertebrate creatures are capable of replacing damaged organs, the zebrafish is unusual as a vertebrate with this ability.

BBC: Zebrafish hold clue to mending hearts

Moon's work focused on studying how a cascade of chemical signals was involved in the regeneration of the fins of zebrafish and the bodies of tadpoles.

FORBES: Regenerators

Louis Kunkel, a professor of pediatrics and genetics at the hospital, used zebrafish to test over 1, 200 drugs to see which ones might restore normal muscle structure.

WSJ: Birds Do It, Bees Do It, Even Zebrafish Do It��Just Too Little

Once the genetic sequence of the zebrafish is known, scientists will be able to make changes to the animal's DNA to study how human inherited diseases might arise.

BBC: Zebrafish genome next

Gregory Paull, a researcher at the University of Exeter in the U.K., traveled to Bangladesh in order to study zebrafish in the wild in the hopes of learning more.

WSJ: Birds Do It, Bees Do It, Even Zebrafish Do It��Just Too Little

The first light-activated neurons were cultivated as layers of cells in Petri dishes, but researchers were quickly able to make the technique work in flies, worms, zebrafish, mice, and monkeys.

WSJ: Scientists Cast Light Onto Roots of Illness Deep in the Brain

And zebrafish make excellent guinea pigs.

WSJ: Birds Do It, Bees Do It, Even Zebrafish Do It��Just Too Little