Hi @fg-PowerPages,
can you see if that works for you?
https://www.youtube.com/watch?v=yJgg4_-UyB8
You table with fishes need a lookup column to a company.
When a row is added you set up a column which says created by xyz and another column where the company of xyz is in. You should have the table account where each user has a company. Now you can create a filter on the company of that user and filter all fishes depending on their assigned company.
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Hope that helps.
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