We do know that each Scum team has a secret board in this game. We do not know what information is contained there. Thing Fish has implicitly stated that each secret Scum board does not state who is on that team. It is impossible for anyone not Scum to know that. Thus, Thing Fish is Scum.
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Repeating for better signal to noise: What players will potentially be subjected to moderator action at the end of Day 2 due to lack of participation?