The world is so big that the earth has produced more than 1.5 million species of animals, some of which most people must have never seen in their lifetimes.
aye-aye
The finger monkey is the largest nocturnal primate in the world. It has teeth that are constantly growing like rodents and a special middle finger that looks long and thin, like a bone. Despite its ugly appearance, it is the primate that uses the middle finger the most, and they are also known for their very unusual way of eating, which is called "impact foraging".
Finger monkeys tap trees to look for larvae, then use their forward-leaning incisors to bite a hole in the wood. Once a small hole is bitten in the tree, it inserts its long middle finger, pulling the larva out.
Mexican walking fish
The Mexican salamander, or better known as the "Mexican walking fish", is not actually a fish, but an amphibian. The branch sticking out from the side of the head is actually its gills.
Salamanders are carnivores – they eat everything from fish and worms to insects and crustaceans. They are not particularly picky and will eat dead or live meat. In captivity, they often eat harvest shrimp, beef liver sticks, earthworms, fish balls, etc. Young salamanders and those with insufficient food supplies may cannibalize each other, biting off appendages of nearby family members. Fortunately, thanks to their regenerative abilities, injured salamanders can easily regrow severed body parts.
Salamanders are found in only a small area of Mexico and are critically endangered in the wild. They live in less than four square miles of habitat and are severely declining due to development, pollution and invasive species. Their importance to scientific research and their ability to breed in captivity should help ensure their survival.
Amazon vultures
The Amazon vulture monkey is a small monkey found in the Amazon basin with furry ginger hair, hairless head and face, and bright red color. Unlike most monkeys, bald monkeys have a short tail, but without a tail, they can move flexibly around trees with their hands and feet.
Their living area is limited, limited to the Waza forest and other wooded habitats close to the waters in the western Brazilian Amazon and Peru. It is listed as endangered.
Malay wild boar
The Malay wild boar has a pronounced prehistoric appearance with long canine teeth and the appearance of a distinctive weird prehistoric animal.
Its most striking feature is the overdevelopment of the upper and lower canine teeth or upper teeth in males. Those of the palate grow upwards from the base, so they pierce the skin of the muzzle and bend back, eventually almost touching the forehead. Upper teeth up to 30 cm (2 inches).
The purpose of these upper teeth remains a mystery. An early hypothesis was that males use their upper teeth when competing for females. Or during an argument, these teeth may protect the face and eyes from lower teeth. This explanation seemed plausible until zoologists observed wild boar fights. Instead of wrapping their tusks, the animals stood up on their hind legs and "punched" each other with their front hooves. Unlike ivory, these wild boars grow that can't withstand much pressure – they're fragile and unfit for combat.
The Malay wild boar is a docile nocturnal hunting animal that lives in the dense jungle. It runs fast and swims freely. When foraging, it takes root in soft soil and swamps near rivers.
Barreleye fish
The barreleye is a small deep-sea fish with a dome-like transparent head and glowing green eyes. Through the transparent dome, you can see their eyes, brain, and nerves!
The barreleye fish is a deep-sea ghost fish that is so named because it has barrel-shaped eyes covered with green lenses. Eyes aren't the only peculiarities of this fish. They are known for having a clear head filled with fluid and for being able to guide their eyes up and forward. They also have large, flat fins. The species was not known until the 2000s. It is often observed lying motionless in deep-sea waters with the help of flat fins. While doing so, they turn their green blindfolded eyes upwards to observe prey and jellyfish so they can prey on small animals hanging from their tentacles.
Bat-eared fox
The bat-eared fox is a cute little fox species with huge disc-shaped ears like bats that live in eastern and southern Africa and prefer to roam the plains and feed on termites.
Their bodies are usually yellow-brown and the throat and lower part are pale. The outside of the ears, raccoon-like "mask", calves, feet, and tail tips are black. Their legs are relatively short. In addition to their large ears, they are unique from other foxes in their teeth – they have more teeth than most mammals with placentas (46 to 50).
Dripping fish
Dropfish is a deep-sea fish known as the ugliest fish in the world. However, this bad impression is just rumors, and they are actually no different from other fish in their deep-sea environment. The big nose even looks cute. It's just that after the fishermen catch it, because the pressure of the shallow water is too low, the dropfish will turn into a lump and look extremely ugly.
Bobbit's worm
Bobbit's worm is a caterpillar that can grow up to 3 meters long and likes to burrow in the seabed near coral reefs. It attacks its prey and pulls it into the burrow, and due to its good camouflage, it usually only shows the antennae around its mouth, and the prey is too late to find it.
Bobbit's worm is a maned worm that inhabits the warm waters of the Atlantic and Indo-Pacific Oceans. They can be found in coral reefs, sandy and muddy seabeds.
These worms are terrifying, and they are even creepy due to the lack of information about their behavior and ecology.
capybara
Capybaras are the largest rodents in the world. They are semi-aquatic and are known for looking like giant guinea pigs, and some birds love to sit on their heads.
Capybaras are skilled swimmers who swim with only their nostrils, eyes and ears exposed. They are also known to swim underwater, sometimes at great distances.
Capybaras live in large large family members, with group sizes ranging from 2 to 30, with one male dominating. They practice polygamy, and males protect foraging resources associated with water bodies. It may be a good choice for humans to reincarnate as male capybaras in the next life.
Dugong
The dugong is a herbivorous marine mammal, sometimes called a "manatee," with a cute, plump appearance, dolphin tail, round head, and downward nose.
Dugongs are rare and inhabit shallow or deep waters. They don't surface very often. Dugong is listed as an endangered species, and its decline is a huge problem that requires urgent attention.
Dugongs are very intelligent aquatic creatures. When there is no seaweed, it migrates to different places. They communicate with each other in a twitter sound. Feeding on seaweeds may cause further food shortages, but they actually reproduce their own food by inflating the seabed, thus promoting grass growth.