World's 10 Most Bizarre Sea Creatures

Here are 10 of the more unusual creatures found underwater.

From monstrous to ethereal, the sea is filled with all sorts of magnificent specimens.

Here are 10 of the more unusual creatures found underwater.

Number 10. Siphonophores. They're clear and fragile, but given the length and bioluminescence of some of them, they can be quite a spectacle to behold. Select ones have been measured at over 40 meters long. Be careful around them though. They break easily.

Number 9. Vampire Squid. Like its namesake, this cephalopod wanders about in the dark. In order to survive the deep area it occupies, it has had to give up some other functions, like spewing ink clouds.

Number 8. Anaximenes Amphipod. Looking like the offspring of a water glass and an alien, this mysterious diaphanous crustacean was spotted off the coast of Southern Turkey.

Number 7. Goblin Shark. Ideally suited for a sci-fi horror movie, this sea beast is actually built for roaming around the deep sea. Its beady little eyes are the result of not surfacing often.

Number 6. Dumbo Octopus. It was named thus because it has two flaps on its head that resemble big ears, just like the cartoon elephant has. When these creatures float around they take on an umbrella-like appearance.

Number 5. Colossal Squid. Yeah, they're big. These squid can reach about 17 feet in length. Despite the claims gone viral on social media, they do not grow to be the size of military submarines.

Number 4. Barreleye. Transparent fish are not rare, but this one only has a see-through head, making it quite unique. It has eyes that completely rotate around their sockets, making it possible for the barreleye to look through itself.

Number 3. Disco Clam. It's a bivalve and a light show. Scientists have discovered that it produces the pulses by moving its silica-covered lips back and forth to catch and reflect rays, just like a disco ball.

Number 2. Predatory Tunicate. They live anchored to the walls of deep canyons and must feed on whatever passes by -- sort of like a venus flytrap. And if there aren't any other tunicates nearby, they're able to reproduce on their own.

Number 1. Gigantocypris. Oddly, it's also known as the Giant ostracod, even though it's only about 2-and-a-half centimeters wide. 20 percent of its body is taken up by their eyes, which are made of big reflectors and light-sensitive materials.