Sea Zoanthids ~ Zoanthids are an order of cnidarians commonly found in coral reefs, the deep sea and many other marine environments around the world. These animals come in a variety of different colonizing formations and in numerous colors.
Orange Sea Pen (Ptilosarcus gurneyi) found in temperate waters of the northeastern Pacific. Each Pen is a colony of polyps -- the primary polyp loses its tentacles and becomes the stalk, with a bulb as its base.
The aptly named Ping-pong tree sponge (Chondrocladia lampadiglobus) is a carnivorous sponge. Those ping-pong ball looking things are covered in tiny spicules which the sponge uses to catch tiny crustaceans.