Sea Urchins- Some Sea Urchins Have Venomous Spines: Don’t worry, a rabid sea urchin is not going to leap off the reef and fling spines at you. A purple sea urchin sits in a touch tank at the Marine Hatfield Science Center in Newport, Oregon [Gillian Flaccus/AP Photo] ... "You can't just go out and smash them. It can be very cute to watch and see what they are going to try to grab onto and haul around next.

Still, sea urchin injuries are not unusual. Divers can easily become distracted and brush against one of these delicate creatures. Some species also have venomous spines that will impales you if you try to touch them.

Soaking the area in hot water (110 to 130 F) for up to an hour and a half can break down the venom and help to alleviate the pain. Spines: A sea urchin’s spines can inject painful venom.

You can … Soaking the area in hot water (110 to 130 F) for up to an hour and a half can break down the venom and help to alleviate the pain. If you’re stung by a sea urchin, immediately remove any part of the sea urchin that’s embedded within your body. You’ll need between 200 and 250 grams of uni for this recipe.
There's too many. Sea urchins are non-aggressive and relatively slow-moving. As you’re about to see though, it can also be very risky… Pincushion sea urchin: a comedian, weight lifter, and camouflage artist all in one prickly package… Cons of having a pincushion sea urchin in your tank: They can get pretty big. Here’s how you make it… Before You Do Anything… Soak your oursin uni (the sea urchin’s yellowish-orange gonads) in the juice of two fresh-squeezed limes, salt, pepper, garlic, and a touch of scotch bonnet pepper for 30 minutes.

Tidal Touch Zone in the Pacific Seas Aquarium is an intertidal world you can touch: sea star, urchin, cucumber, art mural and more.
Use tweezers to remove the large spines. To Make The Batter For the most part, they are ‘poky.’ Their spines are, in many cases intended for defense.