So last year I was tearing down a tank for an older gentleman getting out of the hobby. In that tank he had a basic purple urchin that he says had been in there for 10+ years. It’s still going strong to this day in a little tank I threw together for a lobster.
I’ve read that urchins live for a crazy long time. What’s the longest you’ve kept one ?? What about other urchins like a Halloween urchin pictured above ? Longspine ? Genuinely curious because they are probably my favorite creatures to watch


