Sea Urchin’s in the sand

While swimmers LaRopa I’m seeing sea urchin in the sand, mostly in 10-15 feet of water, but I don’t remember this problem in past years. I’m thinking of trying to remove them before they take over., maybe spear them and bring to deeper water. If anyone stepped on one it would ruin their day. I now always use my swim goggles to check out the sand while playing in the surf.
Is it legal spear them? Suggestions to remove them?

Humm, water must be cooling off. Never see many Urchins until the cold water moves in