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.
Multicolored Nudibranch Photograph by Mohammed Alsaleh, My Shot Generally oblong in shape, nudibranchs can be thick or flattened, long or short, ornately colored or drab to match their surroundings. Some max out at a quarter of an inch millimeters)
The "sea angel", a swimming sea slug, is most beautiful of the deep sea animals he snapped -- not exactly a tough contest to be fair. Mostly transparent, the sea angel's internal organs appear to glow brightly in the image.
Branching sponges are veritable magnets for seahorses. Colorful natural hitching posts like this will encourage brightly colored seahorses such as this Ocean Rider Hippocampus erectus to retain their vivid wardrobes." Photo by Leslie Leddo