For 10 points, identify this model organism, a freshwater fish, which is so named for its black and white stripes.
Eggs of this organism can be held in the ovarian fluid of O. kisutch to facilitate delayed in-vitro fertilization. Establishment of the dorso-ventral axis in this organism involves the secretion of BMP2B in the ventral mesoderm that is blocked by chordino secreted by the dorsal mesoderm. Christiane Nusslein-Volhard, Wolfgang Driever, and Mark Fishman developed an ENU-based technique for mutagenizing this organism; thousands of mutations in developmentally active genes were recovered in those Boston/Tubingen screens, though this organism is of limited use in forward genetic screens due to a genome duplication in the teleost lineage. The Casper mutant of this organism is completely transparent, and they take on a tadpole-like form 24 hours after fertilization. For 10 points, identify this model organism, a freshwater fish, which is so named for its black and white stripes.
Eggs of this organism can be held in the ovarian fluid of O. kisutch to facilitate delayed in-vitro fertilization.
zebrafish [accept zebra danio or Danio rerio]