Could you survive in space wearing scuba diving gear?

Not for long. See Space exposure. It's possible that breathing oxygen at low pressure would be better than trying to breathe vacuum, and keep you alive a little bit longer than the 90 seconds or so without, but scuba tanks usually have air and I'm not sure the demand regulator would work in vacuum. read more

Ok, no you can't survive in space in a swim suit. There, I edited my answer for it to stop being a joke answer. read more

You cannot reduce the pressure in your lungs below that of a vacumn, so you cannot draw a breath off a SCUBA regulator in space. You might be able to reach up and press the purge button and get some air, depending on the make and model. read more

Once certified, scuba diving can cost as little as renting a scuba tank or having your own filled — an expense characteristically less than $10 per tank — and traveling to an area lake, quarry or river, or diving from a public beach entry. read more