Can Christians Consume Crayfish?

A few weeks ago I ran across an online post called, "11 Things the Bible Bans, But You Do Anyway". It was a fascinating list that included things like tattoos, eating shellfish, and trimming one’s sideburns.  A formidable list!  And indeed, all of those prohibitions can be found in the pages of Scripture.  But the post invites a question…

 What does it mean when someone says “the Bible forbids” something?