Zebrafish

 Michael - Zebrafish live in a river in india. And zebrafish are transparent. They live in India where there is freshwater. Scientists study zebrafish because they are transparent.  Zebrafish is 2.5cm to 4cm long. In its larval stages it is transparent and as it matures to an adult it develops stripes that run along the length of the body and look blue in colour. The zebrafish are called embryos; the egg has three layers: The single cell. The yolk and the protective membrane. And it takes 3 or 4 days for the egg to hatch and the zebrafish lifespan is 2 to 7 years. After scientists breed about a hundred or thousands of zebrafishes killed them and looked at them under a microscope to study them. E.g cutting the head off the body, sagittal means cutting in half and vertically E.g cutting the left side away from the right side. Different types of dye to see different body parts like the eyes then the scientist do pictures.