PUB ARTWORK - GLASS

I had lunch with my boss and coworker today. The pub had these glass balls hanging from the ceiling in the foyer. I'm not sure if they have something to do with fishing (the pub looks over the river and there is a small marina there), or if it's local art. I thought they were neat so I took a picture of them. I didn't quite do them justice, but the shots are still pretty cool.