Octopus

Kingdom:	Animalia
Filum:	Moluska
Kelas:	Cephalopoda
Subkelas:	Coleoidea
Superordo:	Octopodiformes
Ordo:	Octopoda

The octopus is a mollusk animal (soft-bodied animals) dri cephalopoda class (animal legs located in the head), Octopoda order with coral reefs in the Ocean as the main habitat. Octopus consists of 289 species that account for one-third of the total species of cephalopoda class.

The octopus has 8 arms (not tentacles) with a vacuum in the form of concave spheres on the arm used to move on the ocean floor and catch the prey. An octopus, which is a muscular hydrostatic structure that is composed entirely of layers of boneless muscle or outer skeletal bone. But there are some octopus that only consists of muscle and boneless skeletal inside. The octopus does not have a shell as a protector on the outside as does nautilus and has no inner shell or bone like cuttlefish and squid. The beak is the hardest part of the body of the octopus used as the jaw to kill the prey and bite it into small parts.

The octopus is pale or white, but the color of the skin can be changed according to the color and pattern of the surrounding environment with the intention of camouflaging. The ability to change color is used octopus to communicate or warn other octopus. Some octopus species can break their own limbs (muscle) like lizards and some lizard species that decide the tail while running away. The crawling octopus arm also serves as a diversion for the prospective predator and is useful at the time of mating. Several species of octopus have a fourth defense system in the form of imitating the form of dangerous marine animals such as lepu and eels thanks to a flexible body combined with the ability to change color

The male octopus reproduces by placing the spermatofora pouch into the female octopus cavity using a special arm called hectocotylus. The third right arm usually becomes hectocotylus in some species, the female octopus is biased to keep the sperm alive until the egg matures. Once fertilized, the female octopus can lay eggs up to about 200.00 eggs. The number of octopus eggs may vary depending on each individual, familia, genus or species.

the octopus has good eyesight. Octopus pupil are shaped like a pit of a piggy bank so it is feared to suffer from an astigmatic deformity, but it does not seem to be a problem for hunting octopuses with insufficient illumination. The octopus eye "can" differentiate the polarization of light but seems color-blind. The octopus arm suction tool is equipped with a chemoreceptor so that the octopus can feel the object being touched. The octopus arms are equipped with a chemoreceptor so the octopus can feel the object touched.

Question :

1. How many species that Octopus has ?

    A. 298

    B. 276

    C. 237

    D. 289

    E. 269

2. What is Octopus sub-class ?

    A. Elasmobranchi 

    B. Malacostraca 

    C. Coleoidea

    D. Teleostei 

    E. Insecta 

3. How many arm that Octopus have ?

    A. 7

    B.8

    C. 9

    D. 5

    E. 6

4. How many eggs that female Ocotopus can lay ?

    A. 100.000

    B. 200.000

    C. 50.000

    D. 5.000

    E. 40.000

5. What is Octopus defense mechanism ?

    A. Camouflage

    B. Ink sac

    C. Toxic gas

    D. Fire breath

    E. Answer A and B correct

My Last Holiday

My last Holiday

Usually i always spend my holiday at home. but, yesterday i spend more outside. In the morning i've decide to went outside from home. In the morning, I went to the weekly event called car free day on foot because it's not far from my home. Car free day is an event in which all people exercise way without a vehicle. In place of the car free day, too many people who also sell a variety of food and
goods. When I came, there were already many people who start exercising.

When I was walking in the car free day, I see many people who exercise in addition to the usual running, cycling, skateboarding, playing badminton, etc. In addition to exercise, many people doing activities other than exercise. Examples include playing music, selling food, blood donation, etc. When I was walking I saw a bunch of people who are playing music and that attract people. I see people who are playing the music and rest after a long walk. After that I walked back. When I walk I was very thirsty and want a drink. Luckily I was offered a drink by the seller and buy it.When I was driving around in the car free day, I see an attraction carried out by college kid, that is the attraction of the person's hand when the burning but not exposed to Burns. I was curious and wanted to find out how the hand of the person is not caught fire when a hand "holding" the fire. The man is offering to me to do the attractions. I also accept it. The man told me to wash my hands with SOAP. Then the man is issued a gas into the SOAP. I was told to take the bubble already filled by the gas. When I was ready, the men turn the lighter to my hands and fire there in my hand. I was surprised because the fire didn't injure my hands and just feels a sense of heat from my hands. After that I was given a gift by the man and I continue my walk.


After all this time I was in the car free day I finally decided to return home. I went home a happy situation due to the biased view and do a lot of activities in the car free day. I'm finally home from the car free day car using public transport. When I get home I don't see anyone in the home. Luckily I brought a spare key to enter the House. When it makes me feel very tired and I was finally deep asleep.When I woke up it turned out that my mother had already returned home. I looked at the clock and it turns out I've been asleep for about 2 hours. My mother any States to me how my experience above, I finally told me to on my mom about anything happening in the car free day.