The Helmet Jellyfish does not have the normal stinging tentacles like other jellyfish of the world. Instead, they use stiff tentacles that are held in front of them as they swim. They capture small fish with these, swinging them into their mouth to feast.
The Xyloplax, also known as “sea daisies,” are saucer-shaped starfish with feathery spines that resemble flower petals surrounding its body. They tend to be found a few thousand feet below the surface.