The spotted handfish, Brachionichthys hirsutus, is a rare, endangered Australian deepwater fish. Its pectoral fins look like short arms with hands. Using these extremities, the handfish can swim as well as "walk" on the seafloor, and it often prefers to walk.
Not all species of sea cucumbers (Holothurians) look like, well, cucumbers. Some species, which have swaying branch-like tentacles on one end of their long bodies, more closely resemble a chubby stalk of broccoli. Above is a colorful shot of a purple and orange-colored sea cucumber with its tentacles spread out.
Named for its long, vampire-like teeth the fangtooth fish inhabits the extreme deep waters of the ocean. In proportion to its body size, it has some of the largest teeth of any fish. Although it may look scary, the endangered fangtooth only grows to about 6 inches (16 cm) in length.
A deep-sea jellyfish, the blood-red Atolla wyvillei emits a spooky blue light when it is threatened by a predator. Its bioluminescent light flashes in a hypnotic, rotating pinwheel pattern around its body
Another bottom-dwelling bioluminescent creature, the blackdragon fish has light-emitting organs arranged all along its belly to fool predators by changing its silhouette. The spooky fish also has bioluminescencant "flashlights" next to each eye that it can flash on while on the look-out for prey or to signal potential mates. As you can see in the above photo, the blackdragon fish is so toothy that even its tongue has razor-sharp teeth.
Found in deep tropical waters around the world, the coral-red armored searobins have bodies encased in heavy scales. They also possess prominent spines, with barbels on their chins for luring in unsuspecting prey.
The terrifyingly toothy anglerfish became a common occurrence in little kids' nightmares ever since it chased Nemo and Dory in Pixar's "Finding Nemo." To attract prey, the scary-looking fish uses a bioluminescent "fishing pole" that hangs just above and in front of its toothy face. The lure is actually a piece of dorsal spine packed with millions of glow-in-the-dark bacteria.
The deep-sea Aequorea, or crystal jellyfish, has a translucent body and long tentacles that give it a ghostly appearance. A jellyfish's tentacles, which trail after its body, can be less than an inch to120 feet (30.48 meters) long.
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