Marina Madness is a Zone on Mobius. It is a coastal attraction from Knuckles' Chaotix that is filled with luxurious boats, although there are measures to prevent visitors from getting near the water.
Although Marina Madness has not appeared in a Sonic the Comic strip, it was name-checked in the Badnik Alert! feature of the Knuckles Knock-Out Special. Certain Badniks make this level their home: