So recently I've noticed lots of zoos opening temporary stingray touch pools. What I'm wondering is why would they open these. It cost more money to operate saltwater tanks with life systems to build fences for normal temporary exhibits. Also, are all of the stingrays wild-caught, or was there some stingray boom in aquariums? The whole system is just bizarre, and I wanted to know if anybody else noticed this or had any answers to my questions.