Access 2007 using multiple tables in form

Hi,

I am trying to learn how to use Access properly for tracking. I have created a table with a unique i.d. for each record and will have around 60,000 records. I will have several tables, one at the moment, containing information for some of the records in the main table. I have created a form with the information from the first table and the second table. I linked and/or made a relationship between the tables. When I open the form it only shows the records that have information from both tables have in common. In other words, it only shows the records that are on the second table. I want the form to show all 60,000 records but include information from other tables. Every table I will create will have the ID. I also want to be able to input information into the form and have it update the tables, so I hope this will work.

I hope you can understand what I am trying to explain. I will try to be more specific. Each record in the main table is a fish. A variety of tests are run on each fish, each test is a different table. I want a form which shows information on each fish and each test run on that particular fish.

Please help. My frustration with not understanding this is running...how can I grasp excel but not access. grrrr