Disturbing behavior down in Florida … a man in Miami walked into a dance studio and stuck his nose in the couch cushion where an underage girl had just been sitting … it’s all on video, and now cops are involved.

The creepy footage from inside a Miami dance studio picks up with a girl sitting on a couch near the front door … she gets up to leave, and then a man enters, makes sure the coast is clear, and then buries his face in the cushion where she’d been sitting moments earlier.

Miami Springs PD Chief Matthew Castillo tells TMZ … one of the owners of a local dance studio contacted cops that night to report the “disturbing” incident, which happened Tuesday night as business was winding down.