Top 10 Most Dangerous Fishes | Top 10 Deadly Fishes

Different people share various different kinds of fear. Fear of height, fear of flight, fear of exams, fear of animals etc. This article is about some extremely dangerous fishes around the World. Fishes are amongst the beautiful creatures in the world. The nature has gifted us with countless fish species. Some of them are used for eating, while others are just kept in artificial aquariums to beautify our environment. Despite the fact that the fishes are very beautiful, sometimes they prove to be extremely dangerous as well. Here are the top 10 most dangerous fishes under the blue water.

The Stonefish: Synanceia or Stonefish is a genus of fish of the family Synanceiidae, the Stonefishes, whose members are venomous, dangerous, and even fatal to humans. It is one of the most venomous fish in the world. They are found in the coastal regions of Indo-Pacific oceans as well as off the coast of Florida and in the Caribbean.

Great White Shark: The great white shark (Carcharodon carcharias), also known as the great white, white pointer, white shark, or white death, is a species of large lamniform shark which can be found in the coastal surface waters of all the major oceans. The great white shark is mainly known for its size, with mature individuals growing up to 6.4 m (21 ft) in length (although reports have been published of great white sharks measuring over 8 m (26 ft), and 3,324 kg (7,328 lb) in weight). Read More…

Black Piranha: The black piranhas have the most powerful bites of carnivorous fishes, living or extinct, once body size is taken into account, researchers find. The black piranha has jaw muscles of an 'extraordinary' size and a highly modified jaw-closing lever. In fact, the muscle complex makes more than two percent of the black piranha's total body mass. This allows the fish to exert bite force equivalent to 30 times its bodyweight.

The measured bite force of the black piranha, at 320 Newton (N), was nearly three times greater than that exerted by an American alligator of comparative size.

Lionfish: Pterois, commonly known as lionfish, is a genus of venomous marine. It is characterized by red, white and black bands, showy pectoral fins and venomous spiky fin rays. The lionfish is one of the most venomous fish on the ocean floor. Lionfish have venomous dorsal spines that are used purely for defense. When threatened, the fish often faces its attacker in an upside down posture which brings its spines to bear. Read More…

Goliath Tiger Fish: Goliath Tigerfish, also known as the Hydrocynus goliath, giant tigerfish or mbenga, is a very large African predatory freshwater fish of the Alestidae family. The Goliath tigerfish puts more energy into killing than breeding. It can take a local population between five and 14 years to double in size. Ergo, every one you release helps ensure that the monsters remain in adequate numbers to keep the ecosystem in stasis.

Bull Shark: The bull shark (Carcharhinus leucas), also known as the Zambezi shark or, unofficially, as Zambi in Africa and Nicaragua shark in Nicaragua, is a shark commonly found worldwide in warm, shallow waters along coasts and in rivers. Bull sharks have the strongest bite of any shark species, scientists have discovered. The bull sharks have a bite force of up to 600 kilograms (1,300 lb), pound for pound the highest among all investigated cartilaginous fishes.

Pointed sawfish: Pointed sawfishes, also known as carpenter sharks, Smalltooth Sawfish or Wide Sawfish, are a family (Pristidae) of rays characterized by a long, narrow, flattened rostrum, or nose extension, lined with sharp transverse teeth, arranged so as to resemble a saw. All species in the family are either endangered or critically endangered.  Several species of sawfishes can grow to about 7 m (23 ft). The family as a whole is largely unknown and little studied. The Pristidae are the only living family within the order Pristiformes, whose name comes from the Ancient Greek. Read More…

Electric Eel: The electric eel (Electrophorus electricus) is an electric fish, and the only species in its genus. It is capable of generating powerful electric shocks of up to 600 volts and 1 ampere of current (600 watts). It would be extremely unlikely for such a shock to be deadly for an adult human, due to the very short duration of an eel's discharge

Tiger Shark: The tiger shark is a solitary, mostly nocturnal hunter, and is notable for having the widest food spectrum all sharks, consuming a variety of prey ranging from crustaceans, fish, seals, birds, squid, turtles, and sea snakes to dolphins and even other smaller sharks. The tiger shark has been known to eat inedible manmade objects that linger in its stomach, and it has a reputation as a "garbage eater". When attacking, the tiger shark often eats its prey whole, although larger prey are often eaten in gradual large bites and finished over time. Read More...

Chironex (Box Jellyfish): Box jellyfish (class Cubozoa) are cnidarian invertebrates distinguished by their cube-shaped medusae. Stings from these and a few other species in the class are extremely painful and sometimes fatal to humans. A few species of Chironex (Box Jellyfish) have been confirmed to be involved in human deaths.

Electroreceptive Fish or Electroreception in fish

Electroreception is the ability to perceive the world via electricity. This non-human sense has been discovered in many fishes like as Electric ray or Pacific Torpedo Ray, Stellate Sturgeon or starry, Scalloped Hammerhead Shark or Hammerhead sharks, Pacific Lamprey, Thornback Skate, Sandbar Shark, Chimaera. They used it for detecting objects around them.

Chimaeras: Chimaeras are cartilaginous fishes in the order Chimaeriformes, known informally as ghost sharks, ratfish, spookfish or rabbitfishes. They may be the oldest and most enigmatic groups of fishes alive today. Chimaera
	Coelacanth: The coelacanths constitute a rare order of fish that includes two extant species in the genus Latimeria: the West Indian Ocean coelacanth (Latimeria chalumnae) and the Indonesian coelacanth. Coelacanth
Pacific lamprey: The Pacific lamprey (Entosphenus tridentatus) is an anadromous parasitic lamprey from the Pacific Coast of North America and Asia. Lamprey, any of about 43 species of primitive… Pacific lamprey
	Pacific electric ray: The Pacific electric ray (Torpedo californica) is a species of electric ray in the family Torpedinidae, endemic to the coastal waters of the northeastern Pacific Ocean from Baja California… Electric Ray
Sandbar shark: The sandbar shark, Carcharhinus plumbeus, is a species of requiem shark, family Carcharhinidae, native to the Atlantic Ocean and the Indo-Pacific. It is distinguishable by its very high first dorsal… Read more…
	Scalloped Hammerhead Shark: Sharks have been around for over hundreds of millions of years. While many of us may be familiar with a few shark species, there are over 400 of them and Scalloped Hammerhead… Read more…
Stellate Sturgeon or Starry Sturgeon: The Stellate Sturgeon, Acipenser stellatus, also known as starry sturgeon or sevruga is a species of sturgeon. It is native to the Black, Azov, Caspian and Aegean Sea… Read more…
	Thornback ray or thornback skate: The thornback ray (Raja clavata) or thornback skate is a species of fish in the Rajidae family. It is found in coastal waters of Europe and the Atlantic coast of Africa, possibly… Read more…

Thornback Skate | Thornback ray

The thornback ray (Raja clavata) or thornback skate is a species of fish in the Rajidae family. It is found in coastal waters of Europe and the Atlantic coast of Africa, possibly as far south as Namibia and even South Africa. Its natural habitats are open seas and shallow seas. It is sometimes seen trapped in large estuarine pools at low tide. 

The thornback ray is probably one of the most common rays encountered by divers. Like all rays, it has a flattened body with broad, wing-like pectoral fins. The body is kite-shaped with a long, thorny tail. The back is covered in numerous thorny spines, as is the underside in older females. Adult fish can grow to 1 m (3.3 ft) in length, although most are less than 85 cm (33.67 in). This ray can weigh from 4.5 to 8.75 lb (2 to 4 kg). 

In sexually mature fish, some of the spines are thickened with button-like bases (known as bucklers). These are particularly well developed on the tails and backs of sexually mature females. Their colours vary from light brown to grey with darker blotches and numerous small darker spots and yellow patches. Sometimes the yellow patches are surrounded by small dark spots. The underside is creamy-white with a greyish margin.When threatened they can appear black. 

The thornback ray is usually found on sedimentary seabeds such as mud, sand or gravel at depths between 10 and 60 m. Juvenile fish feed on small crustaceans, particularly amphipods and bottom-living shrimps; adults feed on crabs, shrimps and small fish.

Stellate Sturgeon | Starry Sturgeon

The Stellate Sturgeon, Acipenser stellatus, also known as starry sturgeon or sevruga is a species of sturgeon. It is native to the Black, Azov, Caspian and Aegean Sea basins, but the fish has been extirpated from the last and it is predicted that the remaining natural population will follow soon due to over fishing. The starry sturgeon is an anatropous species, which migrates up rivers to spawn.

The starry sturgeon or Stellate Sturgeon reaches about 220 cm (7.2 ft) in length and weighs up to 80 kg (180 lb). It is a slim-bodied fish easily distinguished from other sturgeons by its long, thin and straight snout. A row of five small barbells lies closer to the mouth than to the tip of the snout. The scales on the lateral line number between thirty and forty and these features distinguish this fish from the Russian sturgeon (Acipenser gueldenstaedtii). The maximum reported age for this species is 27 years.

Facts and figures of Stellate Sturgeon:

• Acipenser stellatus was always rare in the Middle and Upper Danube, but also ascended several tributaries as Prut, Tisza, Drava, Sava and Morava.
• Stellate Sturgeons migrate in spring and autumn. Males remain at spawning sites for up to six weeks, females for only 10-12 days.
• Stellate Sturgeons stop eating once they start their migration. After spawning, they return to the sea quickly where they begin feeding again.
• 87% decline in global commercial catch reflects the decline in species population.
• 55,000 sturgeons found dead in the Sea of Azov in 1990 as the result of pollution.
• 72.5% is the decline of Stellate Sturgeon catch over a 4-year period according to data from Romania.

The starry sturgeon is an important commercial species of fish. It is one of the three most important species for caviar along with the Beluga sturgeon and the Persian sturgeon. Its flesh is considered an expensive delicacy in the Caspian region. It is used to make kebabs, or is consumed pan fried, broiled, or smoked.

Scalloped hammerhead | Scalloped Hammerhead Shark

Sharks have been around for over hundreds of millions of years. While many of us may be familiar with a few shark species, there are over 400 of them and Scalloped Hammerhead Sharks is most familiar among them. This shark is also known as the bronze, kidney-headed or southern hammerhead.

Scalloped Hammerhead Sharks (Sphyrna lewini) are probably the most commonly found species of hammerheads located in coastal regions, appearing in very shallow waters such as estuaries and inlets. It is a species of hammerhead shark, family Sphyrnidae. Originally Zygaena lewini, it was later moved to its current name. The Greek word sphyrna translates into "hammer" in English, referring to the shape of this shark's head.

Behavior: At certain times of the year and places, and during certain phases of their lives, scalloped hammerheads form very large schools this is most likely because it is easier for the scalloped hammerhead shark to obtain food in a group than alone. This behavior allows for them to catch larger and trickier prey, as commonly seen. The younger the sharks, the closer to the surface they tend to be, while the adults are found much deeper in the ocean. They are not considered dangerous and are normally not aggressive towards humans. Sometimes counting hundreds of individuals, but they also swim the oceans alone. Some populations remain stationary; others clearly wander, migrating in the direction of the poles in summer. Some sexually-related migrations have also been observed, e.g. females who undertake migrations during particular periods of their sexual development.

Size: Mature females can reach a length of more than 4 meters; the average length is, however, less. Males reach sexual maturity at a length of about 160 cm, females when they reach approx. 210 cm. The pups measure approx. 50 cm at birth.

Distribution: It primarily lives in warm temperate and tropical coastal waters all around the globe between latitudes 46° N and 36° S, down to a depth of 500 meters (1,600 ft).  Scalloped hammerhead sharks are found practically around the world in the coastal regions of tropical, subtropical and moderate climate zones.

Diet/ Feeding: This shark feeds primarily on fish such as sardines, mackerel and herring, and occasionally on cephalopods such as squid and octopus. Large scalloped hammerhead sharks also eat small-sized shark species such as the Atlantic sharpnose shark (Rhizoprionodon terraenovae) or the blacktip reef shark (Carcharhinus melanopterus).