These tiny crustaceans sometimes like to make their home in sea urchin spines but, thanks to the razorfish’s creative method of disguise, a house viewing can become deadly before they’ve even ...

A diver demonstrates the painful consequences of stepping on a sea urchin, revealing how its sharp spines penetrate the skin and the challenges of removing them. The video highlights the ...

Sea urchins move across the sea floor using their spines. Each spine is attached to the test by muscle and the spine bases are articulated via a ball and socket joint. Walking is effected by ...

The sea urchin population in many coastal areas is on the increase, and this could have a negative impact on recreational activities associated with the coast. In certain areas, hundreds of these ...

Beachcombers along the Texas coast were in for a treat this past week as numerous Sand Dollars washed up along the shoreline.

The surface of heart urchin plates is covered in a mass of small tubercles marking the attachment sites for spines and pedicellariae. In the specimen illustrated tubercles are of various sizes, the ...