Deep sea accommodates the largest habitat on Earth, extending from several hundred feet below the ocean surface to just above the seafloor. The marine animals which inhibit at the depths have adapted themselves to almost total darkness, weightlessness and infrequent food source.


On this exploration mission, we’ll go with a submarine to reach the depths in order to see closely these bizarre deep-sea creatures. If the depth is not too deep, you’ll have to dive together with me to unveil the mystery of these marine creatures. When our submarine reaches the deepest of the sea, there’ll be no light penetrate through it. We’ll be in the pitch dark, and the temperature there is near freezing. The pressure outside our submarine will be extremely intense to have a golf ball crushed. So, make sure you’re strong and healthy enough to fit the extreme condition at the depths. When our submarine starts moving downward the sea, you’ll occasionally see some flashes of light by peering out the window of the submarine. The light that you may have seen is caused by the bioluminescent (more than ¾ of the marine animals in the deep sea can produce their own light via bioluminescence) creatures that dwell at the depths.

Now, I’d like to bring you along to explore some of the sea aliens that inhibit the oceanic depths. I hope you enjoy exploring deep into the sea! Get yourself ready, our exploration will start very shortly.



This snake-like deep sea creature is called Fimbriated Moray Eel, or scientifically it is named as Gymnothorax Fimbriatus. It is found lying under a coral reef ledge on a shore off the coast of Anilao in Philippines.



A Sponge Brittle Star (Ophiothrix suensonii) is wrapping around a purple sponge at night. This sponge is more commonly seen in the West End of Grand Bahamas.


Wow, one strange alien spaceship is now approaching our submarine! It is the transparent jellyfish (Arctapodemia genus) seems to inhabit in the deep sea of the Antarctica’s McMurdo Sound, 3,500 km (or 2,200 miles) due south of New Zealand.


This opalescent squid is now navigating the dark of the sea with its giant eyes. It is moving around the waters of the Papua New Guinea.




These flamboyantly decorated marine animals are soft mollusk creatures that dwell in the oceans of Caribbean, Mediterranean and Indo-Pacific. These sea slugs or nudibranch can also be found in the tropical waters of the western Pacific Ocean which offers them favorable survival environments.




Nothosaur has a long tail, needle-like teeth and short legs. It has leathery skin covered its body. It looks very much like a prehistoric crocodile.



These giant jellyfish are called “echizen kurage” in Japanese. They are seen swimming around the Sea of Japan, Fukui Prefecture. The Japanese divers have found them 5m below the sea floor off the Town of Echizen, which is situated in Fukui Prefecture, Japan. These marine creatures are blamed by the local fishermen for damaging their fishing nets.


This transparent juvenile boxfish, or the round-belly cowfish is cute and I’d have thought of keeping it as a pet. It is swimming around the coast of Kona, Hawaii. As you see out the window of the submarine, there are two short horns on top of its head.




This guy has a weird appearance. His name is “Mola mola” or the ocean sunfish. One of its companion, weighing 880-pound was caught and displayed (the third picture) at the Monterey Bay Aquarium in Monterey, Calif. It was then released to sea on 4 November, 1998.


Wow, this giant Pacific Octopus (Octopus dofleini) has a weight of 50kg! How heavy it is! In the kingdom of an invertebrate, it is grouped as an intelligent creature. It is known to prey on sharks.



This box jellyfish (chironex fleckeri) is found in the northern Australia. Its tentacles can reach 15ft (4.6m) and its sting can be deadly. The first photo shows the largest box jellyfish of its species which has been documented for having as many as 60 tentacles.



Hi, my dear friend, I can speak in English. I’m a pipefish and am swimming around the water of the Pacific Ocean with my tabular snout. I’ve a blood relation to a seahorse. There are more than 150 of my species.



This is a yellow trumpet fish. Its mouth looks like a trumpet, huh? This guy can swim as gracefully as the world’s number one gymnast. He swims around the water of the Tuamotu Archipelago in French Polynesia. He often hides himself alongside the larger upright-oriented fish in order to approach his prey easily.


Hey, do you know who am I? Try to guess me, please! Hmmm, I know, you can’t guess me right… I’m a conger eel (Ariosoma balearicum). Quiet! I’m now peering out of the sandy burrow in the waters of Caribbean near Cuba to spy on my enemy. I prefer to hide myself during the daytime as I don’t want people to laugh at my ugly face. But, I’ll get out from here at night in search for food.


This is a soft mollusk animal (no back bone) and it is called Bacculite, or a straight ammonite. It is named such a way as it has a straight but not spiraled shell.




I’m a big boss in the deep sea. Who dares to fight with me? Give me a way, or I’ll have you completely eaten!


Protostega is the largest turtles to ever live on Earth. Its length can be more than three meters or ten feet. As it is big in its size, it has a great advantage to swim faster. Therefore, it is considered as an excellent swimmer.


This is a crow shark. It has its upper and lower jaw of teeth resemble of the tiger shark. As both have a similar teeth structure, their diet may be similar too.


Oops! What’s this? It’s like a transparent apple with many tentacles attached to its top. This is hydromedusa. It uses its luminescent tentacles to aid itself swimming through the dark of the depths. It is seen in the Weddell Sea near Antarctica.


Again, what’s this? Is this a deep sea hot air balloon? No, it’s a tiny jellyfish. Its orange central mass is visible to look at through its transparent body. It has its tentacles almost folded inside its body. Like Hydromedusa , it is seen in the Weddell Sea near Antarctica.

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