10 Scary Sea Monsters

Stonefish

Stonefish is extremely dangerous, live primarily above the tropic of Capricorn. The reef stonefish is the most widespread species of the stonefishes family, and is known to be found in the shallow tropical marine waters of the Pacific and Indian oceans, ranging from the Red Sea to the Queensland Great Barrier Reef. They are carnivorous ray-finned fish with venomous spines that lives on reef bottoms, camouflaged as a rock. They are the most venomous known fish in the world.

Fossil fish Coelacanth 

Coelacanths belong to the subclass Actinistia, a group of lobed-finned fish that are related to lungfish and certain extinct Devonian fish such as osteolepiforms, porolepiforms, rhizodonts, and Panderichthys. Coelacanths were thought to have gone extinct in the Late Cretaceous, but were rediscovered in 1938 off the coast of South Africa. Latimeria chalumnae and the Latimeria menadoensis are the only two living coelacanth species, which are found along the coastlines of the Indian Ocean. The coelacanth has been nicknamed a “living fossil”, because it originally was known only through fossils, long before the first discovery of a live specimen. The coelacanth is thought to have evolved into roughly its current form approximately 400 million years ago.

Dragon fish 

Deep water fish species, a quiet fearsome predator with a slim body and large head and sharp fang-like teeth, eating smaller fish. Their gut is heavily pigmented, so that any luminescent organs in their prey cannot shine through their bodies and attract larger predators.

Blue-ringed Octopus

The blue-ringed octopuses is a tiny cephalopod that packs a lethal punch, are three octopus species that live in tide pools and coral reefs in the Pacific Ocean and the Indian Ocean, from Japan to Australia. They are currently recognized as one of the world's most venomous marine animals. Despite their small size and relatively docile nature, they can prove a danger to humans. They can be recognized by their characteristic blue and black rings and yellowish skin. When the octopus is agitated, the brown patches darken dramatically, and iridescent blue rings or clumps of rings appear and pulsate within the maculae. Typically 50-60 blue rings cover the dorsal and lateral surfaces of the mantle. They hunt small crabs, hermit crabs, and shrimp, and may bite attackers, including humans, if provoked.

Fang tooth fish

The fang tooth fish is a sea monster creature that looks so scary. It has only about 6 inches long, and has a large head, long teeth, and you cannot find it easy, because it lives in depths water of approximately 5,000 meters.

Killer Whales 

The killer whale, commonly referred to as the orca whale or orca, and less commonly as the blackfish, is a toothed whale belonging to the oceanic dolphin family. Killer whales are found in all oceans, from the frigid Arctic and Antarctic regions to tropical seas. Killer whales as a species have a diverse diet, although individual populations often specialize in particular types of prey. Some feed exclusively on fish, while others hunt marine mammals such as sea lions, seals, walruses and even large whales. Killer whales are regarded as apex predators, lacking natural predators.

Anglerfish

Anglerfishes are bony fishes named for their characteristic mode of predation, wherein a fleshy growth from the fish's head acts as a lure; this is considered analogous to angling. Some anglerfishes are pelagic (live in the open water), while others are benthic (bottom-dwelling). Some live in the deep sea and others on the continental shelf. They occur worldwide. Pelagic forms are most laterally (sideways) compressed whereas the benthic forms are often extremely dorsoventrally compressed (depressed) often with large upward pointing mouths.

Spider Crab

Tall-footed crab, is a species of marine crab that lives in the waters around Japan. It has the largest leg span of any arthropod, reaching up to 3.8 metres (12 ft) and weighing up to 41 pounds (19 kg). It is the subject of small-scale fishery..

Sperm Whales

The sperm whale is the largest species of toothed whale, with adult bulls (males) growing to be about 15–18 metres (49–59 ft) long, and weighing about 45–70 tonnes (44–69 long tons; 50–77 short tons). The two kogiid species are much smaller, at only around 2.5 to 3.5 metres (8 ft 2 in to 11 ft 6 in) in length, and weighing 350–500 kilograms (770–1,100 lb).

Giant Squid

The giant squid is a deep-ocean dwelling squid in the family Architeuthidae, represented by as many as eight species. Giant squid can grow to a tremendous size recent estimates put the maximum size at 13 metres for females and 10 metres for males from caudal fin to the tip of the two long tentacles (second only to the colossal squid at an estimated 14 metres, one of the largest living organisms). The mantle is about 2 metres long (more for females, less for males), and the length of the squid excluding its tentacles is about 5 metres. Claims of specimens measuring 20 metres or more have not been scientifically documented.