Personally, I always considered Moab class bloons to be alive, but I’m not sure if this is canonically true. I always considered Moab class bloons to be advanced bloon technology that is alive, since all “new bloons” created are considered alive by me, but I’m not sure if this is canon for Moab class bloons.
I'd say that MOAB-class are not alive, just vehicles created by the bloons and monkeys. There is no canon on this matter. There is even more evidence for BADs (and their BTDX equivalent, Party Blimps) not being alive than for lower tier blimps. As of BTD6's time, the zombie MOABs and BFBs may just be bloons instead but with similar properties. (They are still weaker than normal MOABs or BFBs.)