ZFS Snapshots

I have snapshots enabled on my Raidz2 but feel like I should have more space than I do as I only have about 1TB left of 24TB of raw space.

Is there an easy way to look at snapshots and delete them, or does ZFS auto remove them or?

And just to make sure, is there any other places that zfs will "recycle" files so I can try to free up space. Thanks.

A quick google search solved my own problem.

http://docs.oracle.com/cd/E19253-01/819-5461/gbcya/index.html

Went from 1.43 TiB free to 4.93 TiB... now I can at least wait to buy more hard drives..