Are there any special rules or adjustments in the Settlers of Catan Seafarers 5-6 player expansion that players should be aware of"?

Yes, in the Settlers of Catan Seafarers 5-6 player expansion, players should be aware that the game board is larger to accommodate more players, and there are additional rules for building ships and exploring new islands. Players should also be mindful of the increased competition for resources and strategic placements on the board.