Gasteracantha

Lung fish form a strange group of very primitive fish that can breathe from the air. All the living species of this group live in the southern hemisphere of the planet and, as aquatic animals, their biology is very determined by this means. Dipnoi or pulmonary fish are a group of fish belonging to the sarcopterygii class, where fish with lobed or muscular (fleshy) fins are classified. To date, six species of lungfish are known, which are grouped into two families. The Lepidosirenidae and Ceratontidae...

We've all heard the expressions "sweating like a pig" or "I'm sweating like a pig" sometimes. We've probably used it ourselves. But are you sure that the expression corresponds to reality? Is it true that pigs don't sweat? If popular myths are based on real facts or if it is just an exaggeration or a false belief about pigs. So why don't pigs sweat? We have to know that these mammals lack the sweat glands responsible for the generation of sweat (which we humans do). For this very reason a pig cannot sweat...

It's time to talk about animals once considered legendary. Try to imagine what the sailors of the 1500's had to think about being in front of an angry hippo. It was certainly easier to imagine him as a monster born from hell. Here are some practical examples. Giant squid Giant squid can reach a length of 13 metres: from the caudal fin to the end of the two long tentacles. Giant squid tales have been common among sailors since ancient times and may have led to the Norwegian kraken legend. It is thought...

Increasingly worrying reports continue to spread about the decline in the bee population. Ecological groups, knowing the importance of bees, continue to put pressure on governments to protect them. Government institutions prohibit only part of the products that are toxic to bees. Besides, climate change continues to accelerate and the habitat in which bees live continues to decline. Role of bees Bees are hymenoptera insects of the Apoidea super-family, as well as another important pollinating insect, the hornet...

Did you know that the longest animal in the world is a jellyfish? It is the Cyanea capillata, most commonly known as the lion's mane jellyfish, and is even longer than the blue whale. The largest specimen known to exist was found in 1870 on the coast of Massachusetts. Its bell (or umbrella) was 2.3 meters in diameter and its tentacles reached 36.5 meters in length. The common name, jellyfish lion mane, comes from the physical appearance and similarity it has with the mane of the king of the forest...

Although it may seem that rabbits are silent and very quiet animals, they have a good variety of sounds to indicate different moods or needs. The rabbit's verses are used to communicate with their companions, whether they are human or not, so it is very important to learn how to identify them. Rabbits, because of their status as prey animals, tend to remain silent and immobile when amid nature. But in a house, their behavior is different. In the security provided by living in a house, rabbits can make more sounds and move more...

Humans have been studying the behavior of animals for centuries. Ethology, which is the science that studies the behavior of animals, demands, among other objectives, to solve the mystery "Do animals think?". Since we have made intelligence one of the "keys" to distinguish ourselves from animals. If we want to reach a conclusion on the question of whether animals think or not, the first step is to define what is meant by "thinking". Thinking' comes from the Latin 'thinking' and had the meaning of weighing, calculating or reflecting...

Over the past 20 years, pigs became popular as pets in Western countries which, paradoxically, include this meat in their diet. After years of living together, we have seen many cases where these pets have saved their tutors. Others have learned behaviors that until then were not considered proper to these species. All this has made us question their degree of intelligence and their emotional abilities. Therefore, recent studies have helped to provide more data on the intelligence of pigs. Why...

As everyone knows, children are extremely curious and, in general, they love to see new animals and maybe touch them. Nevertheless, it depends on the specific taste of each child which is the creature that causes them the most surprise, admiration or fear. Don't forget that it is important to make children aware of the issue of endangered animals, respect for fauna and flora and, finally, the responsibilities that a pet implies. The dolphin Dolphins are very intelligent mammals that live in the water of almost all the world...

Bears are land mammals that live in different ecosystems around the world. They can live in forests, grasslands, and polar areas and are always at the top of the food chain. How much do you know about their habits and life cycle? Bears are mammals that can reach between 1.3 and 2.8 meters in height and can weigh up to 500 kg. These considerable dimensions make them among the largest terrestrial animals in the world. Their appearance varies depending on the species, but they all have small ears and a short tail, a long snout, small eyes on a large head...

Most of these animals are dangerous because of the toxicity of the poison, while other specimens, such as the white shark, because of the power of the bite. Sea wasp The Chironex fleckeri, better known as "sea wasp" or "box jellyfish", is a type of cnidarium that belongs to the class of cubomeduse. Its sting would be deadly if the poison came into direct contact with our skin. They have a singular, cubic shape, of these jellyfish there are less than 40 species that are classified into two families: the Chironomidae and the carybdeidae...

You've probably seen camels crossing endless deserts on television or in movies, resisting long walks at even extreme temperatures. The question then arises: how do camels survive in the desert, in such inhospitable conditions? Types of camels Before we talk about how camels survive in the desert, we must start by differentiating the types of camels that exist: the Arab camel, or dromedary, and the camel native to Asia, the Camelus bactrianus. The main difference between these two animals is that the camel has two humps while the dromedary has only one...