Investigating fish scales

To conduct this investigation with your class you will need two varieties of fish scales from two different species. This is so the students can compare two of the four main types of fish scale.
You can remove my images of herring and perch and replace with fish species that suit the ocean or waterways where you live.
The students will conduct their investigation and record their findings by drawing a detailed picture of their fish scale and identifying important features such as
•shape,
•thickness
•colour
•size
After careful observation of their fish scale under a microscope the students should be able to compare their scale to the diagrams on the powerpoint and be able to identify if the scale is placoid, ganoid, ctenoid or cycloid.