Knobby Star Natural (3+in) 3 pcs spiny Nautilus are considered living fossils

Nautilus are considered living fossils because they have been traced back 500 million years

The Stove-pipe Sponge (Aplysina archeri) is a species of tube sponge that has long tube-like structures of cylindrical shape

along with its close relatives

which aids in prey capture

and purple

Knobby Star Natural (3+in) 3 pcs spiny Nautilus are considered living fossilsThe Knobby Star is sometimes called the jeweled star because of the blue and white knobs all over its body. Diet: The mouth of the Knobby Star is located on its underside, and when eating, the sea star actually extends its stomach out through its mouth and digests its prey externally. The Starfish you receive may not look exactly like the image. No two are alike.