I love these little guys so much, they're so cute! It's so adorable when they stick on each other's heads. A while back, I actually looked into what conditions they need just to see how finicky they are. They're apparently super hard to care for. These little guys are apparently quite smart, so they need a lot of enrichment, and also very cold salt water.

I forget if I shared this here before, but did you know that some sea urchins wear hats? There's now online stores that sell tiny, 3d printed hats for them. https://www.boredpanda.com/sea-urchins-tiny-hats/?utm_source=google&utm_medium=organic&utm_campaign=organic