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5 Mysterious Sea Creatures You May Not Know Exists

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Incredible creatures have been the beauty of nature amid how their activities on earth have been able to keep up with the operation of life.

It’s also thrilling how explorers have been able to discover mysterious creatures which their exhibition in the life cycle is still studied today.


Most of these mysterious creatures were found in the aquatic habitat and these have expanded research among adventurers. Through their research results, many sea creatures are common to many.

Despite the advanced growth of knowledge inducted into people in the modern century, there are still countless numbers of mysterious sea creatures uncommon to a vast number of people.

This is the reason we have carefully scrutinized and gathered some mysterious sea creatures you may not know. We will discuss their status and detail their exhibition on earth below.

5 Mysterious Sea Creatures You May Not Know Exists

Japanese Spider Crab

(Macrocheira kaempferi) 


The Japanese Spider Crab which is also known as Macrocheira kaempferi is a mysterious marine Anthropod which has caught explorers on their nerves.

Its uniqueness is impeded by its leg span. They are recognised as the Anthropod with the longest leg span. They grow to a whopping length of 3.7 m (12.1 ft) from claw to claw.  Just like most of the species of Anthropod, they undergo different stages of growth.

Female Japanese spider crabs grow shorter chelipeds, which are shorter than the male pair of legs. The male species grow longer chelipeds. They are incredibly known for the qualities they have developed by abstaining from their predators. Most times, the Japanese Spider Crab prefers deterring their predators by blending its bumpy carapace into the rocky ocean floor and adorning its shell with sponges and other animals than hunting for prey.

Apart from illuminating its shell with sponges and other animals, the Japanese Spider Crab uses its chelipeds to tear or twist its prey; worm tube or sponge for its comfort of consumption.

Japanese spider crabs reproduce through fertilization. After fertilization, the female Japanese Crab carries the fertilized eggs in their appendages until they hatch into tiny planktonic larvae and continue to condone their other life cycle. They lay up to over 1.5 million eggs every single year and they all hatch in 10 days difference.




The mysterious bony fish identified as Anglerfish or Lophiiformes also has astonished explorers with the unbelievable qualities it has got.

The Pisces are popularly known for their uniqueness with predation. Angler Fishes work very co-operatives with bacteria they collect from the deep sea where they dwell.

The luminescence that comes from symbiotic bacteria is the pinnacle of the light their esca produce to lure their prey into the dark. Most of the organism that resides in the darker part of the sea habitat are attracted to light. Female Angler fishes use this favour to lure their prey to its comfort zone with the light they produce with their esca. Light production is most common in the female species. It’s also used to lure male species for mating.

The male species are smaller in size and prefer hiding in rocks while portraying predation.

The uniqueness of the capacity of their mouth has attracted much attention to their statuses. Angler Fish can swallow prey that is two times bigger than its size. They also store food in their mouth if the prey is abundant. This adaption is spanked by the dirt of food in the darker habitat of the sea.


(Psychrolutes marcidus) 


Psychrolutes marcidus which is popularly known as Blobfish is another underwater mysterious creature that belongs to the family Psychrolutidae. They are mostly found in the deep waters off the coasts of mainland Australia and Tasmania, as well as the waters of New Zealand.

The blobfish lacks muscle but can still easily capture its prey as its main food source is an edible matter that floats in front of it, such as deep-ocean crustaceans.

This is made possible by the power of its flesh that is consist of a gelatinous mass with a density slightly less than that of water. This allows the creature to float above the seafloor without expending energy on swimming.

It’s also known for its poisonous nature. No single explorer has ever survived coming in contact with a life blobfish. They are highly poisonous.

Greenland shark

(Somniosus microcephalus) 


Greenland shark which is also known as somniosus hmicrocephalus. They are popularly known for their mysterious abilities which are still explored by biologists to date.

Their life span is unique following how they can live up to 100 to 500 years. They are highly toxic. According to the medical team, Greenland fishes kill its victim in less than 4 minutes their flesh is consumed. Even if they are cooked, steamed and fried. However, Iceland specialists treat its toxicity and eat them.

During predation, they often hunt prey that is asleep because of their weak speeding ability. They condone this by activating their colouration. With that, they can approach prey undetected before closing the remaining distance by opening their large buccal cavity in order to create a suction that draws in the prey.

This shark can easily attack human swimmers and easily swallow them but the frigid water they inhabit has made this impossible. They are not friendly with humans because they predate every flesh.

Greenland Sharks are also known for their migration abilities. Greenland sharks migrate annually based on depth and temperature rather than distance. They also condone a mutual relationship with crustaceans which attaches themselves to the shark’s eyes for safety. In this situation, they sometimes lure prey to the shark for predation.

Colossal squid

(Mesonychoteuthis hamiltoni) 


The Colosial Squid also known as Mesonychoteuthis hamiltoni is another mysterious creature that belongs to the family of cranchidae.

The colossal squid is the largest known invertebrate because of the astonishing length of its tentacles.

Their uniqueness is embedded in their mode of predation. They practice bioluminescence as the key pinnacle of their predation buoyancy.

Most of the prey lured to their comfort were enticed to them by the attraction of different types of light they produce by themselves. They feed on prey such as Chaetognatha, large fish such as the Patagonian toothfish, and smaller squids.

bioluminescence according to Wikipedia is explained as the production and emission of light by living organisms.

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