12. VIPERFISH

via science-rumors.com

The large jaws and openly visible jagged teeth on the Viperfish make it look very threatening, although this small fish usually doesn’t grow much bigger than about 12 inches. The long dorsal spine that curves along the spine is tipped with light that it flashes on and off in order to attract smaller fish. Since its fangs are so long that they do not fit in the Viperfish’s mouth, it is believed that they use their sharp teeth to impale their prey before consuming it (science-rumors). The Viperfish come in a few different colors, such as silver, black, or even green.

11. VAMPIRE SQUID

via kcra.com

With quite an intimidating name, the Vampire Squid is typically red in color and has eight arms connected by webbing that make it look similar to a cape vampires are usually associated with. Vampire Squids usually inhabit deep oceans in tropical and temperate regions. Unlike many of the other underwater creatures that live deep in the waters, the Vampire Squid has clearly visible eyes, which can be a vibrant red or blue. Similar to other underwater creatures though, the Vampire Squid’s body is covered with light-producing organs. These can be turned on and off at will either to disorient predators or to attract potential prey.

10. FRILLED SHARK

via oceana.org

The Frilled Shark looks to be another one of those creatures that seems like it was the result of an experiment that combined two different kinds of animals (nationalgeographic). Although the Frilled Shark looks very similar to other sharks in terms of its facial resemblance and needle sharp teeth, the body tends to be longer and leaner than most other sharks which give it the appearance of being an eel. Typically brown or grey, the Frilled Sharks swims along the seafloor looking to capture prey with a mouth that can open wide enough to swallow creatures half of its size.

9. GULPER EEL

via science-rumors.com

One of the more bizarre looking creatures on this list, the Gulper Eel is distinctive because of its enormously large mouth which hinges open wide enough to swallow creatures much larger than itself. The body of the Gulper Eel is long and lean like most eels, but since it can swallow such large prey, the stomach is able to stretch to significant portions to accommodate digestion (seasky). The Gulper Eel has a very long tail that it uses to move around through the waters, and is tipped by a photophore- a light producing organ that is common in most underwater creatures who live in darkness to attract prey.

8. GHOST SHAR

via earthtouchnews.com

With distinctively large and gray blue colored eyes, the Ghost Shark can leave quite an impression because of how rarely it is seen by humans. The Ghost Shark lives in darkness and is usually not very large, with an average length of three feet in length (nationalgeographic). Unlike many other sharks, the Ghost Shark doesn't have hundreds of sharp teeth, instead it crushes its small prey using the mineral plates they have instead of teeth. The blue green color of its skin almost make it look translucent as it swims along the ocean floors, which gives it the appearance of gliding along like a ghost.

7. STARGAZER FISH

via saltstrong.com

The Stargazer Fish may not be one of the most colorful creatures on this list, but its dull brown color helps it to blend into the ocean floor more easily where it buries its entire body so completely that only its face and eyes are visible (saltstrong). The Stargazer fish may not look very threatening, especially when so much of it is buried in the sand or mud, but it can be dangerous if disturbed because it not only has two large poison spines on each pectoral fin, these spines are also capable of emitting some pretty strong and disabling electric shocks!

6. JAPANESE GIANT SPIDER CRAB

via news.it

With the honor of being the only Crab on this list, the Japanese Giant Spider Crab is also the largest known species of crab with an average life expectancy of up to 100 years (national geographic). The Giant Spider Crab is also a master of playing defense; not only are they protected from predators by their armored exoskeletons, their bumpy exterior and color is used as camouflage to blend into the rocky ocean floor and they deliberately pick up sponges and other small animals to adorn its shell and further the illusion that they are a random rock on the ocean floor.

5. BLUE RIMMED OCTOPUS

via museumsvictoria.com.au

Although there are certainly much bigger and fearsome looking octopuses in the sea, the blue Rimmed Octopus is distinctive because of its unique, bright coloring that make it stand out among many other underwater creatures. The Blue Rimmed Octopus is quite small and rarely grows larger than about eight inches long, but one of the reasons it is so fearsome is because this little creature is one of the most venomous animals in the ocean, with a bite that can cause intense and quick muscle paralysis (nationalgeographic). Once the Blue Rimmed Octopus has its prey between its teeth, it injects them with venom to easily consume whatever unlucky creature it managed to snatch.

4. FANG TOOTHED FISH

via oceana.org

One of the more menacing looking fish on the list, the Fang Toothed Fish is named so because of its incredibly large mouth. The Fang Toothed Fish has such big and sharp teeth that they do not allow it to close its mouth completely which makes it look like it is always hungry and ready for its next meal. The entire fish’s body is covered with small, prickly scales which make it look even less inviting. Thankfully, since the Fang Toothed Fish usually likes to hang out in the deeper ocean waters, most people are in no danger of actually meeting one face to face.

3. BLACK DRAGONFISH

via fishesofaustralia.net.au

The Black Dragonfish lives up to its fierce name with an even fiercer appearance. Its mouth is permanently ajar so that their numerous sharp teeth are one of the first things we notice. Although Black Dragonfish can produce their own blue/green light similar to many other underwater creatures who live at such dark depths, they also have the powerful advantage of being able to produce light in the infrared range to provide light for themselves that most other creatures are unable to detect. The fish’s long, slender body is covered in light producing photophores which light up on command or when the fish has been threatened (futurism).

2. RED COFFINFISH

via fisheries.noaa.gov

In the same family as the Angler Fish and Sea Toads, the Red Coffinfish are typically found hanging out somewhere on the ocean floor. These are some of the few fish that “walk” along the ocean floor due to their leg-like fins. Much like the Angler Fish, the Red Coffinfish that live in darkness also have a lit-luring mechanism on their heads that they use to bring prey close enough to eat (nespmarine.edu.au). Their usual pose is to have one hand on a rock and one hand on the sediment in order to steady themselves against the strong ocean currents.

1. SARCASTIC FRINGEHEAD

via animalbliss.com

Although the Sarcastic Fringeheads may not be the largest or most fearsome looking underwater creature on this list when they keep their mouths closed, they are known for fiercely defending their small territory in a rather unexpected way (oceana.org). The Sarcastic Fringehead likes to live in burrows in the waters of places like California and México and when it perceives that its personal space has been encroached upon, whether on purpose or accidentally does not matter, it will move aggressively and upon its jaws extremely wide in order to bare it’s small, sharp teeth and sink them into anything that is unfortunate enough to have drawn too close.

References: Oceana.org; futurism.comnespmarine.edu.au; nationalgeographic.com; discovery.com