The cute little giant salamander, known as the "hexagonal dinosaur", is a unique species in Mexico. It lives in mud and is about 25 ~ 30 cm long. Although it is so weak, its vitality is extremely tenacious, especially when its leg was broken when it was a child, and it will soon grow out.

Deep-sea arowana is a fierce carnivore, belonging to the order Dracaena. It has a big head, many long and sharp fangs, and a luminous bait growing on its chin. It keeps flashing and swinging back and forth to lure prey, and when it approaches, it holds on with sharp teeth. Deep-sea arowana also has two rows of luminous devices on both sides of its body. These light-emitting devices can send signals to other giant mouth fish during mating, and can also imitate the sparkling sea surface, thus misleading predatory fish from below.

Everyone should know about eels, but have you ever seen such a fierce banded eel? The striped eel is very aggressive, and its body length can reach 1.3 meters. The magic thing is that it can change color and change sex, and it is a very powerful role.

Psychedelic salamander, which looks fierce, hides something like pearls and is breeding. The psychedelic salamander comes from Indonesia. The pattern on its body looks like a shell and is good at hiding.

What a big mouth? Actually, it's not. Look carefully, it turns out that the mouth is not at the top. What is this? Actually, this is? Fish is also called "sucker fish". Its back is not a mouth, but a big sucker, which is often attached to marine life such as sharks or turtles, hence its name. It is 220 ~ 450 mm long and is also called the laziest fish in the world.

A strange creature was recently discovered off the coast of Borneo. Due to unrecognizable, it was temporarily named "turtle". It has spear-shaped teeth on both sides of its mouth, and the spine on its back is high and covered with hard thorns. Neither local fishermen nor experts can identify this creature, as long as its feet.

Wide-throated fish, large in size, has been recorded that its body length can be as long as 1.8 meters. It has no movable upper jaw, but its huge lower jaw is loosely connected to its head and never fits its mouth. When it opens its mouth, it can easily swallow animals bigger than it, so it has won the title of "umbrella mouth devourer" in the west. 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 eel has no ribs, and its stomach is flexible, so it can hold its prey.

Anglerfish get their name from the organs growing on their noses, which are shaped like fishing rods. This organ full of bioluminescent bacteria can emit light and lure small fish into prey. When scientists first discovered them, they noticed that they were almost all females. Finally, it is found that the "parasites" on female fish are actually greatly reduced male anglerfish. The female anglerfish is dozens of times larger than the male anglerfish. During mating, the male anglerfish plunges his body into the female anglerfish, the lower jaw gradually merges with the female body, and the body gradually shrinks and disappears until only the gonads are left. Since then, the male blood has merged with the female, and the male anglerfish is almost "parasitic" on the female anglerfish, relying on the female nutrients to survive.

American biologists found a strange bait in the deep sea, which has a transparent head and tubular eyes. It is vividly called the tube-eye fish, and its scientific name is Macropinna microstoma. Since this kind of fish was discovered in 1939, biologists now know that this kind of eye can concentrate light especially. However, their shapes only allow fish to have a tubular line of sight, so the field of vision is very narrow.

The sea really brings us an unfathomable sense of awe. There are so many unknown species, unknown ways of survival and reproduction, and the unknown world brings us infinite mystery and surprise. For fishermen, it is a kind of happiness to be able to explore the mysteries of water with the company of rivers and seas!