Start with a review of the animals already studied in class: microscopic animals, earthworm, grasshopper.
1. Made up of cells
2. Breathe/Gas Exchange
3. Eat and Create Waste
4. Grow and Develop
Focus on the organs of the digestive system: grop, gizzard, and intestine. Emphasize that the worm's body is taken up primarily with the digestive organs. Focus on form-fits-function and the role of the earthworm in the ecosystem.
Focus on the sensory organs and the characteristics of insects. Once again reinforce form-fits-function and ask the students to compare and contrast the earthworm and grasshopper.
Present a whole fish (available at the grocery store) asking, What is this? Of course the students identify it as a fish, but then ask them how they know it is a fish. Have the students create the definition of what it takes to be a fish, focusing on form-fits-function.
1. Have gills to breathe.
2. Have fins/tail to move through the water.
Play the game - Fish or Not a Fish
Use the attached powerpoint or handout of animals that live in water and ask the students if the animals are fish or not. The point is not to be correct, but to have the students familiarize themselves with the new definition of a fish and to appreciate the diversity in shapes and sizes of fish and other aquatic animals.
Power Point of Fish or Not a Fish
Day 2 - Marine Biology Coloring Book
Copy and enlarge the external and internal anatomy diagrams of fish from the Marine Biology Coloring Book or find diagrams through Google Image. The aim of this lesson is to familirize the students with what they will be seeing during the dissection.
Day 3 and 4 - Fish Dissection
Dissection Guide for the tilapia.
Fish Dissection Day
Day 5 - 3-D Fish Model