Throughout the ages, humans have harbored an innate fear of the unknown, and this sentiment extends to other species inhabiting our planet. It is this inherent fear that often engenders trepidation towards the vast array of creatures dwelling beneath the ocean’s depths. Just the mere thought of sharks and whales can evoke an overwhelming sense of terror, as our minds conjure images of their powerful presence and enigmatic nature.

But other than shɑrks and wҺɑles, there are many other species of underwater animals wҺich are quite terrifying because of their killing abilities and their attacking style. the goblin shark is one such Terrifying creature that resides in the deep sea and has a body length of 5.4-6.2 meters.

FangTootҺ is another underwater creɑture which is found about 5000 m down The sea and is scɑry enough to terrify humans and other underwaTer animals. ΑnoTҺer sea animal wҺich can scare anybody very easily because of its ferocity and ɑttacking skills is Blɑck Swallower.

this creature can be found 700-2745 meters deep down The sea ɑnd is 0.25 meters in length. Even the ViperfisҺ is known for the Terror it is capable of spreading when iT is in the attacking mood. Some oTher Terrifying creatures in the deep seɑ are megɑmouth sharк, Blue-ringed Octopus, Rattail, Barreleye, marine hatchet fish, and Snaggletooth sҺɑrk.

A fish (pl : fish) is an aquatic, craniate, gill-bearing animal that lacks limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. Approximately 95% of living fish species are ray-finned fish, belonging to the class Actinopterygii, with around 99% of those being teleosts.

The earliest organisms that can be classified as fish were soft-bodied chordates that first appeared during the Cambrian period. Although they lacked a true spine, they possessed notochords which allowed them to be more agile than their invertebrate counterparts. Fish would continue to evolve through the Paleozoic era, diversifying into a wide variety of forms. Many fish of the Paleozoic developed external armor that protected them from predators. The first fish with jaws appeared in the Silurian period, after which many (such as sharks) became formidable marine predators rather than just the prey of arthropods.

Most fish are ectothermic (“cold-blooded”), allowing their body temperatures to vary as ambient temperatures change, though some of the large active swimmers like white shark and tuna can hold a higher core temperature.^[1][2] Fish can acoustically communicate with each other, most often in the context of feeding, aggression or courtship.^[3]

Fish are abundant in most bodies of water. They can be found in nearly all aquatic environments, from high mountain streams (e.g., char and gudgeon) to the abyssal and even hadal depths of the deepest oceans (e.g., cusk-eels and snailfish), although no species has yet been documented in the deepest 25% of the ocean.^[4] With 34,300 described species, fish exhibit greater species diversity than any other group of vertebrates.^[5]

Fish are an important resource for humans worldwide, especially as food. Commercial and subsistence fishers hunt fish in wild fisheries or farm them in ponds or in cages in the ocean (in aquaculture). They are also caught by recreational fishers, kept as pets, raised by fishkeepers, and exhibited in public aquaria. Fish have had a role in culture through the ages, serving as deities, religious symbols, and as the subjects of art, books and movies.

Tetrapods (amphibians, reptiles, birds and mammals) emerged within lobe-finned fishes, so cladistically they are fish as well. However, traditionally fish (pisces or ichthyes) are rendered paraphyletic by excluding the tetrapods, and are therefore not considered a formal taxonomic grouping in systematic biology, unless it is used in the cladistic sense, including tetrapods,^[6][7] although usually “vertebrate” is preferred and used for this purpose (fish plus tetrapods) instead. Furthermore, cetaceans, although mammals, have often been considered fish by various cultures and time periods.