YES IM SURE.
you may have seen them living, but there isn't the slightest chance in hell they were happy.
Think of a big boisterous puppy like fish being pent up in a 4ft tank. its sad.
Minimum of a 5ft long tank, wider is better and the height takes secondary importance. This fish likes swimming, digging and rearranging the tank.
Don't forget that they get big too!