Giant Creatures of The Deep-Sea

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Deep-sea contains the most unusual creatures on earth. In there, you’ll find some of the most horrible-looking and other bizarre creatures in the world. Some giant creatures also live in the deep-sea. Here are some giants found on the deepest part of oceans.

1. Bigfin Squid

Bigfin Squids are seldom seen cephalopods also sometimes called “long-arm squid” and are usually found at a depth of 2,195 m (7,200 ft) to 4,735 meters or 15,530 ft. This squid was estimated to measure 7 meters with arms fully extended.


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2. Dana Octopus Squid (Taningia danae)


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Another giant creature of the deep-sea is the Dana Octopus Squid, one of the largest known squid species, reaching a mantle length of 170 cm or 5.5 feet. It was observed that Dana Octopus Squid emits blinding flashes of light as it attacks its prey. It is believed that this highly maneuverable squid uses the bright flashes to disorientate potential prey. The short flashes are from light-producing photophores on its arms. These flashes may also serve to illuminate the prey to make for easier capture as well as a courtship and territorial display.

3. Robust Clubhook Squid (Moroteuthis robusta)


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The Robust Clubhook Squid, found primarily in the boreal to temperate North Pacific, is the third largest species of squid after the Colossal Squid and Giant Squid. However, it is the largest of the genus Moroteuthis, reaching a mantle length of 2 m. The tentacular clubs are slender, containing 15-18 club hooks. Arms of the species contain 50-60 suckers, and grow to 90-100% of the mantle length.

4. Giant Squid (Architeuthis)


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This big water creature named Giant Squid is a deep-ocean dwelling squid that can grow to a tremendous size of 13 meters or 43 ft for females and 10 meters or33 ft for males. The mantle is about 2 meters or 6.6 ft long (more for females, less for males), and the length of the squid excluding its tentacles is about 5 meters or equivalent to 16 ft. This large animal is the second largest mollusk and the second largest of all extant invertebrates. It is only exceeded in size by the Colossal Squid

5. Kondakovia longimana

Kondakovia longimana, which occurs in the waters of Southern Ocean, is a large species of hooked squid. It attains a mantle length of at least 85 cm and probably over 1.15 m. The largest complete specimen of this species, measuring 2.3 m in total length, was found in Antartica in 2000. K. longimana is characterized by the presence of 33 hooks and marginal suckers throughout the tentacular club during sub-adult years.

6. Colossal Squid (Mesonychoteuthis hamiltoni)


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This huge deep-sea creature is one of the largest living organisms and believed to be the largest species of squid. Colossal Squid is also sometimes called the Antarctic or Giant Cranch Squid. It is estimated to reach a maximum size 12-14 meters or 39-46 feet long. Its body is wider and stouter, and therefore heavier, than that of the giant squid. Colossal Squids are believed to have a longer mantle than giant squids, although their tentacles are shorter. The beak of Colossal Squid is the largest known of any squid, exceeding that of Giant Squid in size and robustness. It also has the largest eyes documented in the animal kingdom.

7. Seven-arm Octopus (Haliphron atlanticus)


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Based on scientific records, the Seven-arm Octopus is the largest known species of octopus with a total estimated length of 4 m and weight of 75 kg. The Seven-arm Octopus is so named because in males the hectocolytus is coiled in a sac beneath the right eye which is often overlooked, giving the appearance of just seven arms.

8. Galiteuthis phyllura

Galiteuthis phyllura is a gigantic species of glass squid and lives from a depth of 1000-1300 m. A mammoth specimen of this creature was found in the Sea of Okhotsk. Its arm measures 40 cm long and its tentacle is 115 cm. It is estimated to have mantle with a length at 265-275 cm, and the total length at over 4 m. It is the second largest squid species in terms of mantle length, second only to the Colossal Squid, and even larger than the Giant squid but has a narrow body.

9. King of Herrings (Regalecus glesne)


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This giant marine-animal is an oarfish found in all the oceans in the world at depths of between 20 and 1,000 m or 66 and 3,281 ft. Its length is up to 41 feet or 12.5 m, and it can weigh up to 272 kg or 600 lbs. This rarely seen creature is the world’s longest bony fish.

10. Japanese Spider Crab (Macrocheira kaempferi)


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This deep-sea creature is the largest known anthropod on earth. When fully grown, it can reach a leg span of almost 4 m or13 ft. Its body size measures up to 37 cm or 15 inches and weighs up to 20 kg or 44 lb. The bottom of the Pacific Ocean around Japan at about 300 to 400 meters deep is the crab’s natural habitat. It feeds on dead animals and shellfish and believed to have a life expectancy of up to 100 years. It has 8 legs and 2 feeding arms.

11. Giant Isopod (Bathynomus giganteus)


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Giant isopods are thought to be abundant in cold, deep waters of the Atlantic. It is the largest known isopod. They are important scavengers in the deep-sea benthic environment; they are at a depth of 170 m or 550 ft to 2,140 m or 7,020 ft, where pressures are high and temperatures are very low (down to about 4 °C). They grow to a length between 19 and 37 cm or 7.5 to 14.5 in, and reaching a maximum weight of approximately 1.7 kg or 3 lb in. Most other isopods range in size from 1-5 cm. Their large eyes are compound with nearly 4,000 facets, sessile and spaced far apart on the head and have two pairs of antennae.

12. Giant Tube Worms (Riftia pachyptila)


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Giant tube worms lives over a mile deep and up to several miles deep on the floor of the Pacific Ocean near black smokers and can tolerate extremely high temperature and sulfur levels. They can reach a length of 2.4 meters or equivalent to 7 ft 10 in. These creatures are remarkable in that they have no digestive tract. They are among the longest-lived non-colonial invertebrate animals currently known. It takes 170 to 250 years for one to grow 2 meters in length.

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