Aquaculture 3-D Anatomy Model You will choose either a fish, mollusk or crustacean and create a detailed 3-D model of the organism. All important parts of the organism must be clearly labeled. You must include both interior and exterior parts of the organism. For example you cannot just do the external part of a bivalve because that would just be the shell. You must include internal anatomy. You can use any materials you want. Be creative and use what you have on hand.