Zebrafish
New
HavenDirections/Directions.html
 

Zebrafish is an ideal model system to study vertebrate development, organogenesis, neurbiology and behavior.

Zebrafish female ~2cm (1in)

In addition to being transparent, zebrafish embryos develop very rapidly. In just 17 hours this zebrafish embryo develops from a single cell to a multicellular embryo with differentiated tissues and organs. (Karlstrom and Kane Dev 2006)

R

B

SC

M

H

Each couple lays about 200 eggs that undergo external fertilization. This allows embryonic manipulations and direct visualization of development given that the embryos are transparent.

In this 30 hour old zebrafish embryo, you can observe developing organs like the retina (R), the brain (B), spinal chord (SC), the muscle (M) and the heart (H). Transgenesis is a routine technique, on the left there is a GFP-transgenic expressed under the alpha-actin promoter in muscle cells.

These are Sardines, not Zebrafish. Cool movie I took at the Monte Rey Aquarium