Fabolous' Digs in a Pineapple Under the Sea For $4k a Night

Fabolous is living in SpongeBob SquarePants' real-life crib ... except the pineapple's worth a helluva lot more above water.

The New York rapper is on vacation with his fam in the Dominican Republic, where they're staying at Nickelodeon Hotels and Resorts Punta Cana -- in their Pineapple suite of all places.

The 2 bed, 3 bath pad looks like it's straight out of Bikini Bottom ... with grounds worth $3.8k per night. It's got a master bedroom downstairs with another room above it, plus tons of extra space throughout. There's also an infinity pool, tanning beds and private butlers attending to Fab's every need.

Talk about a Fabolous life ... SpongeBob never had it this good.