Ax fish, killer spider, sad fish, blanket octopus…The biological world has countless strange things. Let’s take a journey into the animal world, observe the rich life and understand more about the abilities of these animals.1. “Fishman” OlmOlm is a snake belonging to the family of blind amphibians that lives in underground water caves. Olm has a length of 20 – 40cm with a slim body, small upper legs with three fingers and lower legs with two fingers. This Olm’s skin has a color and texture similar to that of humans and is sometimes referred to as a “mermaid”. Olm have both an external gill system and internal lungs, but they are rarely actually used during respiration. Because their eyes are located deep under the skin and they can only perceive a small part of outside light, Olm exist in the outside world through smell and weakly perceive sounds.2. Blanket octopusThe blanket octopus has 3 hearts, 1 hidden beak like a parrot, and saliva containing venom. They also have the ability to change skin color and texture easily and quickly. Therefore, many people believe that the blanket octopus is no different from an animal from another planet.In addition to normal tentacles, this female octopus also possesses two longer tentacles, attached inside which is a membrane. When they feel threatened, they will spread their membranes to defend themselves and compare their size with their opponents. 3. “Sad” BlobfishThe Blobfish species lives in the waters of Australia and has a strange appearance that resembles a drop of water. Blobfish is 30.48cm long, lives on the seabed, at a depth of about 800m. The body of this strange fish is always “blistered”, it has a very large head and nose, and its mouth hangs down heavily. That’s why many people call blobfish by another name “sad fish”.This “sad fish” lives at depth with creatures that are considered “specialties” of the ocean such as crabs, lobsters… Besides, they have thin skin and move slowly. , it is very easy to get caught in the nets of fishing boats. 4. Assassin spiderDespite its scary name, this spider is only about 2mm long, adults are less than 2cm long and are completely harmless to humans. Killer spiders are notoriously brutal with venomous fangs inside extremely large and strong jaws. They have long beaks, so the neck of this species also develops to withstand the gravity of that beak. Not only that, the neck is also suitable for them to attack prey from a long distance. Killer spiders were found in Europe in the 1840s, the food of this species is mainly spiders. 5. Hatchetfish (axe fish)On the surface, this creature looks like it is wailing underwater because of some curse, but in reality, this is a hatchetfish. They appear a lot at night and live at the bottom of the deep sea. Living in an area without light, the hatchetfish’s eyes must be very sharp to be able to find food. Its body is covered with a silver layer that can glow to lure prey and hide from enemies. Although they have a thin body and are 12cm long, their attack power is very large. 6. Hemeroplanes caterpillars This caterpillar is truly a masterpiece of nature. You can only find this special caterpillar in the rain forests of Mexico and Central America. This creature is small and has a very normal color but when attacked, it undergoes an amazing transformation. The caterpillar will raise the upper half of its body and then inflate it to look like a snake.Not only does it imitate its “triangular head, ferocious eyes and perfectly shiny scales”, this caterpillar also pretends to spit venom at its enemies. However, this type of venom is actually harmless to humans. People.