English name of deep sea arowana: Deep Sea Dragonfish or Scaleless Dragonfish. Size: about 4-6 inches (10.2- 15.2 cm). Habitat range: tropical ocean habitat depth: up to 5,000 feet (1). Although this fish is not big, it is a fierce predator. And the deep sea? ? ? ? Similarly, it has a big head and is armed with a lot of long and sharp fangs, and the deep sea? ? ? ? Similarly, it also has a luminous bait, the only difference is that its luminous device does not grow on the back of the head, but on the lower jaw. And the deep sea? ? ? ? Similarly, it is constantly flashing, swinging back and forth to lure prey, and when the prey is near, it insists with sharp teeth. There are also two rows of light emitters on both sides of the giant mouth fish, which can signal other giant mouth fish during mating, and can also imitate the sparkling waves from the sea surface, thus misleading predatory fish from the depths below. The biggest difference between black giant mouth fish and other species of giant mouth fish is that there are a pair of light emitters under their eyes, which can act as searchlights when searching for prey in the deep ocean. The visible light from the sky has been absorbed in the middle zone, and the deep zone forms an extremely dark environment. In this environment, the eyes of the black giant mouth fish are specialized into a tube, and the photoreceptor cells are densely covered under the large lens. The photosynthesis belt is full of sunshine, and the food is the most abundant. However, some crustaceans and copepods, which mainly live on phytoplankton, will escape from surface predators, and they will swim to the surface for food at night when it is safer, and then return to deeper waters at dawn. Some deep-sea fish also migrate day and night in order to prey on copepods, and further, other large predatory fish follow, thus triggering large-scale animal migration activities. This behavior can increase the material exchange between the surface layer and the deep layer. Giant mouth fish is one of the fish that participate in this vertical migration day and night.

Fangtooth angle tall golden-eyed snapper (English name: Fangtooth or Ogrefish) Size: about 6 inches (15.2 cm) Habitat range: tropical and temperate seas Habitat depth: deep and 16,000 feet (. This kind of fish belongs to the golden-eyed snapper, and it looks threatening. Their big teeth also give it the name "fangs", while its terrible appearance gives it such a terrible English name as "ogre fish". Fangs inhabit particularly deep places in the ocean. Although their most common habitat is 500-2000 meters, the middle of the abyss as deep as 5000 meters is their horrible home, where the water pressure is terrible and the temperature is close to freezing point. There is a shortage of food here, so these fish eat everything they see. Most of their food may have fallen from the upper layers of the ocean. Although this kind of fish is not afraid of cold, they are distributed in the depths of tropical and temperate oceans, because more food falls from them. Adult fish with fangs look very different from young fish. The skull of young fish is long and light gray, while adult fish has a big head and a big mouth, and the color ranges from dark brown to black. Young fish don't start to look like adult fish until they grow to 8 cm. Young fish eat crustaceans, while adult fish eat fish.

Viper fish (Viper fish) The viper fish usually appears in the water layer 80- 1600 meters below the sea surface, and it is one of the most disgusting fish in this deep ocean. This kind of fish has some black bodies and luminous organs in some parts of the body, including a long dorsal fin used as bait. Some poisonous snake fish (and many other deep-sea fish) do not contain any pigment, so they look "transparent"; They also have big eyes, in order to collect more light on the dark seabed; The light-emitting organs emit light through some chemical processes.

? ? ? ? ? ? ? ? Fish are commonly known as stuttering fish, frog, frog, anglerfish and so on. It is a bony fish. ? ? ? Eye,? ? ? ? Family, a worldwide fish, is distributed in the Atlantic Ocean, the Pacific Ocean and the Indian Ocean, with various species: the largest one can reach1-1.5m.. There are only two kinds in our country, one is called yellow? ? ? ? The other is black? ? ? ? . The former has two more rows of mandibular teeth. The mouth is white, and the arm fin is 8 ~11root; The latter has more than three rows of mandibular teeth, black and white circular markings in the mouth and 6 ~ 7 arm fins. Yellow? ? ? ? Distributed in the Yellow Sea, Bohai Sea and the northern part of the East China Sea, black? ? ? ? More common in the East China Sea and South China Sea. ? ? ? ? Fish have two dorsal fins. The first dorsal fin is different from ordinary fish, and consists of 5 ~ 6 independently separated fin spines (6 are yellow? ? ? ? , 5 are black? ? ? ? ）。 The first two silvers are located on the back of the kiss. Its top has a cortical spike. The second dorsal fin and arm fin are both located at the tail. The pectoral fin is wide, lateral, round, and the base is arm-shaped, which is helpful for the body to slide. Short ventral fin, throat position. The caudal fin is rounded. The body is bare and scaleless, and there are cortical processes of different sizes above the head and on the side edge of the body. ? ? ? ? Fish are medium-sized benthic fish, which usually lurk in the bottom of the sea and are not good at swimming. This kind? ? ? ? The total length is only 10 cm. You can't meet prey in the deep sea, so try to swallow food bigger than yourself. Sharp teeth are inward, and once the prey is caught, it will not escape.

Gulper Eel English name: Gulper Eel or Umbrellamouth Gulper \ Size: one can grow to 6 feet (1.8m), and the other can only grow to 30 inches (75cm). Habitat range: worldwide habitat depth: deepest to 5,000. This typical deep-sea fish is one of the strangest creatures in the depths of the ocean. Its most striking feature is its big mouth. This eel has no movable upper jaw, but its huge lower jaw is loosely connected to its head, which never fits its mouth. When it opens its mouth, it can easily swallow animals bigger than it, so it gets the name of "umbrella mouth devourer" in the west and is called "wide swallow fish" in Chinese. The swallowed prey is put into the jaw bag like a fish swallowed by a pelican, so some people in the west call it an eel. This kind of eel has no ribs, and its stomach is very flexible, so it can expand and put down its prey. But don't misunderstand that it mainly eats big animals. In fact, its main food is slow-moving small fish and shrimp, and it is still a minority when eating big meals. These eels live in the deep seas of the world's oceans, with a habitat depth of 3,000-6,000 feet (914-1829 meters), and it is also reported that they inhabit 5,000- 9,000 feet (1500 to 2,729 meters). Because the deep zone is very dark and vision is not important, their eyes are very small. This eel also has a long whiplike tail, and those broad-throated fish caught by trawl are often found to have their tails tied several times by themselves. Like many deep-sea fish, they also have a light-emitting device on the tip of their tail, which can emit red light. Some scientists think that they may often hold their tails in front of their mouths as bait to lure their prey. Observation of them shows that they like to swim in circles, maybe they want to chase the prey who chase their tails, or they entangle their prey with their long tails. The juvenile broad-throated fish live in the photosynthetic zone with a depth of 100 m to 200 m, and then swim to the bottom of the sea in adulthood. There will be some changes in the body of adult male broad-throated fish, including the enlargement of olfactory organs and the degradation of teeth and jaws, while the female broad-throated fish will not change.

Giant Squid English name: Giant Squid Size: 40-60 feet (12.2- 18.3 meters) Habitat range: world habitat depth: deep and 10,000 feet (3,048 meters), this giant squid. In fact, there is a difference between squid and squid. As far as ordinary size squid and squid are concerned, they are similar in appearance, but there are obvious differences: squid is long and narrow, a bit like the spear head of javelin, so it is also called squid. Squid tentacles are not as long as squid tentacles, and they can't all shrink into the body. However, because the term "King Squid" has been used for a long time, it is also common in many formal articles, and it is probably a legal name. Scientists don't know much about this kind of animal, because people have never seen a wild living body so far. What we know comes from the dead bodies of giant squid washed on the beach, and more from the bodies of fishermen's trawls. They are carnivores, and according to the research on the food in their stomachs, they should not be picky eaters and stuff almost everything into their stomachs. They have evolved big eyes, and their eyesight is quite good, and there are a lot of creatures in the deep zone where they live, so these giant squid follow the light with their big eyes and hunt easily. This is the first living thing that scientists have seen. It is the larva of a giant squid, which is the protagonist of many ancient sea monster legends. Even during the Second World War, the crew of a sunken ship reported that their shipmates were eaten by these creatures in the dark at night, and it was also reported that a giant squid ran to the sea and dragged the people in the boat into the sea. Although all those reports have not been officially confirmed, they are depicted as terrible and powerful predators in many pictures.

Giant Isopod English name: Giant Isopod Size: about 12- 16 inch (30.5-40.6 cm) Habitat range: Habitat depth in the world: over 2,000 feet (6 10 meter). Although this big crustacean is not a vegetarian, it is not a fierce animal. It only cleans animal carcasses on the ocean floor all its life. Because of the lack of food in the depths of the ocean, deep-sea lice must adapt to the life of eating whatever falls from above. In addition to relying on pie falling from the sky, they also eat small invertebrates that live at the same depth as them. The largest known giant deep-sea louse is more than 40 cm in size and is one of the largest species in the crustacean family. This animal looks like a prehistoric creature, but when threatened, it behaves like a tidal bug, curling its body into a tight ball and letting its back be hard armor to protect itself. Compared with simple mouths like human beings, their mouth structures are very complicated, including many parts, which can cooperate with each other to pierce, tear and pull out internal organs. For them, the most suitable living temperature is 9 degrees Celsius. And they lay the largest eggs of all known marine invertebrates. The picture shows the newly hatched larvae of the giant Arctic sea louse (Glyptonotus antarcticus), which lives in the islands around the Arctic Ocean and near the mainland, and its deepest habitat is about 790 meters. After hatching, the larvae will eat the eggs that are not hatched, while the female giant deep-sea lice in the Arctic Ocean usually die after laying eggs, and some can survive and give birth again.

Coffinfish Coffin fish has a soft body and a long tail, and the whole body is covered with small spines. Coffin fish can grow to 10 cm long. This creature can be captured in the middle to east Indian Ocean1320-1760m.

Vampire Squid English name: Vampire squid (vampire squid is commonly called) Size: about 6 inches (15.2 cm) Habitat range: tropical and temperate seas Habitat depth: 1,800-3,500 feet (548.6-/kloc-. Its shape is like jelly, more like a jellyfish than a squid or squid (not originally); The ghost octopus's eyes are very big. It is a small animal, only 6 inches long (15.2 cm), but its spherical eyes are as big as those of a big dog. Ghost Octopus is a luminous creature, and its body is covered with luminous organs, which enables it to light and extinguish itself at will. When it extinguishes the light emitter, it is completely invisible in the dark environment where it lives. Unlike most squid, squid and octopus, ghost octopus has no ink sac. Their "arms" have fangs-like nails, which makes them named "vampire squid" in English. There is a pair of "arms" that have changed into elongated thin bodies, which can be stretched to twice the length of this animal's body. They use this pair of flexible tentacles to cooperate with other shorter tentacles to catch prey together. When in danger, the ghost octopus turns all its tentacles up and covers it, forming a protective net with nails. As far as jelly-like creatures are concerned, ghost octopus can swim very fast, reaching two body lengths per second at the earliest, and it can reach this speed within 5 seconds after starting. If danger is imminent, it can make several sharp turns in succession to get rid of the enemy. Their fins can help swimming, just like penguins and turtles do to paddle. The depth of 1000 meters is a suitable place for them to live, but they can still be found as deep as 13,000 feet (4,000 meters).

Lng-nosed Chimaera (Chimaeriformes) is 1 order of the suborder Chondrichthyoidea, which has about 30 species belonging to 6 genera and 3 families. The body length is 60 ~ 200 cm, and the female fish is larger than the male fish. Body extension and lateral flattening. The kiss is short and conical, or it extends the cusp, or it extends flat and flat like a leaf hook, such as the black-line silver shark. A plate-shaped beak with two jaws. The dorsal fin spine is active and can be vertical, and the second dorsal fin is low and elongated, or short and triangular. The tail is crooked, the lower leaf is larger than the upper leaf, and the axis of the tail vertebra is slightly upturned; Or round, the upper and lower leaves of caudal fin are about equal, and the axis of caudal vertebra is parallel; Or linear. The body is smooth, and sometimes the larvae have shield scales on their heads and backs. In addition to fin feet, the male body also has ventral anterior fin feet and frontal fin feet. Eggs are large, cylindrical or oval. The intestine has 3 ~ 3.5 spiral valves. The circular vertebral artery of the heart has three rows of valves. The interval between gill filaments and gills is almost equal. There are 4 pairs of branchial fissures, which are covered by a membranous gill cover and have a total branchial hole at the back. Maxillary and cranial healing. There is no vertebral body, and the spinal cord is constricted without segments; The left and right halves of the belt are separated. No cloaca. In vivo fertilization. When breathing, the main stream of water mainly passes through the nasolabial groove of nostrils to the mouth, and the mouth is generally closed. Swimming is slow, relying on the back of the body, the second dorsal fin and the tail to undulate. The pectoral fin plays the role of propulsion and balance. Distributed in the Atlantic and Pacific oceans, inhabiting the deep sea at 2600 meters or more. Be active at night, and die when you come out of the water. Eating shellfish, crustaceans and small fish. Meat is edible, and liver can make cod liver oil. There are about 4 species in the genus 1 of Agkistrodon, which are distributed in the coastal areas of South America, New Zealand, South Australia and South Africa. There are 2 genera and more than 20 species of silver mackerel, which are distributed in the Pacific and Atlantic coasts. There are 2 genera and 4 species in China, distributed in East China Sea and South China Sea. There are 3 genera in the family Agkistrodon: there are about 2 species of Agkistrodon neoacutus, which are distributed in West Africa and the southern Caribbean; There are 6 species of Agkistrodon, and there are Pacific Agkistrodon in China. South China sea; The genus Agkistrodon is distributed in the Atlantic Ocean, Japan, New Zealand and America. There are 1 species in China, producing in the South China Sea and the East China Sea.