First of all, these animals are smart and can provide various benefits to people. There are guide ones for disabled people, they assist a blind man cross the street or travel through the city or home without any accidents. Secondly, some of them have a real job: they work in police, firefighting, search and rescue services and operations. They can pull children from the fire when all exits are locked or find a wounded man trapped in wrecked vehicles. Besides, their power of scent can help to prevent numerous drug-related crimes, bomb explosions and find lost people or fleeing felons. Thirdly, these animals are perfect guardians and helpers in hunting.
Moreover, dogs feel the mood of their masters; understand the body language and emotions. That’s why a pet tries to be closer to its master when she or he is thrilled, depressed, cheerful or sad.
Furthermore, dogs are not vindictive pets unlike most of animals. Even if you once hit your pet, play with its tail, speak to it in a gross manner, and ignore it, a dog will forget it soon and will treat you like the best bud in five minutes. This is due to the fact that these animals have poor short-term memories, but good long-term ones. An additional point is that a dog generally defeats its master in case of emergency, even if they are not best friends.
To put it simply, when you’ve got the pet, you’ve found a new friend and family’s member. Dogs are active, intelligent and friendly. These pets can make people feel secure and loved.
Jellyfish - the animals, which are all associated with something shapeless and extremely primitive, but their way of life and physiology is not as simple as it seems at first glance. The word "Medusa" usually implies animal from the class Scyphoid and representatives of the detachment Trailed of class Hydroid type Coelenterates. At the same time, in the scientific environment, this word has a wider interpretation zoologists indicate this term any mobile form coelenterates animals. Thus jellyfish are in close relationship with movable types coelenterates (siphonophorae, sea ships) and seat - corals, undigested, HYDR. In total there are more than 200 species of jellyfish.