Any person who saw this amazing creature primarily interested in: Actinium - an animal or a plant?Many misleading introduces the definition of this creature - "sea anemone": after all, most people know that the anemone - a flower.Amazingly beautiful marine life, managed to adapt to life in the form of a rather fragile organisms amaze: and I want to carry them with you, protect and shelter.Not worth it!First of all, not for nothing that sometimes these creatures are called "jellyfish-actin ': they are quite capable to stand up, not just for himself.And secondly, you are unlikely to succeed for them to create a suitable habitat.So, being at the resort, they just enjoy the view and try not to swim too close not to be treated after a rather painful burns.
Appearance
That appearance of these creatures and gives rise to the eternal question: Actinium - an animal or a plant?And by the way, until the end of the 19th century, attributed them to a vegetable species.But science does not stand still: it was found that "sea anemones" - are animals in its structure and way of life similar to jellyfish and other coelenterates, which many biologists rank sea sponges and comb jellies.
If to explain primitive, any actinium (photo shown) - is one big mouth on the stem."Petals", similar to the flower - a tentacle, responsible for the delivery of food.Most often, "Stand" has a flat sole, where "sea anemones" attached to a rock or a solid bottom;but there are species with a pointed extremity - they stuck to the bottom like a bouquet;and there are varieties of floating.By observing the behavior of these creatures have not become puzzled: Actinium - an animal or a plant?Immediately it becomes clear that it is not just an animal - it is a predator.
Sea Anemones - no polyps
will also be a mistake to say that this beautiful creation - the coral.Actin, without a doubt, very close to the polyps that form enchanting of all islands.However, the skeleton they have not formed, and after all corals - a skeleton of polyps.This is not to say that actinium "spineless" because the material filling her space between cells, forming very thick and density resembles cartilage in vertebrates.
What do they eat?
Another argument in doubt, actinium - an animal or plant - her diet.If you are interested remember the plants are fed water (dissolved substances) and those that can be extracted from the soil.However, sea anemones prefer a completely different menu.It consists of medium-sized invertebrates and small fish (if you're lucky).The method of production of food is also absolutely non-plant: tentacles paralyze prey and pull it to the oral cavity.Some may argue, are known and carnivorous plants.It is, however, jaws they can not boast and dissolved production enzymes, located directly on the plate or sheet in the flower-trap.That is not to have bodies for the sole digestion.
The impact on the victim
Even if we assume that actin - a plant, then it is necessary to seek an explanation of its method of hunting.Each stinging cells - albeit very, very small - there is a kind of capsule, which entered into poison.And on the outside there a stinging thread with spikes facing backward.Visually under a microscope, all the device resembles a miniature harpoon.The attack anemones thread is rectified, the needle pierces the victim's body and releases poison.So complex structure has no one plant - they are much lower on the evolutionary ladder and have a much simpler structure.
Incidentally, stinging sea anemone venom is dangerous even for such a large body as a person.Fatal course he will not, however, provide a burning itching, and in some cases necrosis develops.Those who regularly communicates with gentle "anemones", almost all the polls are in the presence of allergy.
famous symbiosis
I must say that most of the sea colors is a fixed way of life.However, updating the hunting grounds - this is what requires any actinium.The movement is usually carried out by symbionts.The most famous of them (thanks to the familiar Soviet touching the cartoon) - hermit crab.The most interesting is that the armored marine life he carries on his "eggshell" deadly for shellfish being.For a long time, they peacefully coexist cancer flower sea transports from place to place, actin represents an attack being made against him in his natural enemies.However, all is not so rosy, "leg" of the sea "flower" easily dissolves organic matter from which the shell is medium, then comes the end of cancer.
Move "sea anemones»
Even sea anemones, which nature intended to "sit" on the spot can be moved.In the end, the small inhabitants of the oceans, as they say, "not stupid locomotive" and eventually realize the danger of some of the bottom area.Accordingly, ocean flowers forced to migrate as their hunting grounds becoming more scarce.As in this case, taking the average of actinium?Move it slowly but surely.The sole is separated from the bottom, pushed at a slight distance, fixed and tightens the rest of the body.However, small variations (like gonaktinii) can even swim, straightening back tentacles.
fish and actinium cooperation
must say, ocean anemones simbiotiruyut not only with the hermit crabs.They travel and other armored (although this is usually the carrier for the same ends, even if small variations).However, sea anemones can coexist peacefully and with fish.At the Australian coast of the biggest on earth anemones (their "mouth" often is not limited to a half meter in diameter) provide shelter among the tentacles of its amfiprionam - very bright fish, which feed fallen leftovers "master" and the work of the fins provide it with additional aeration.Anemones thus quite able to distinguish from other fish of their friends and actively protect them from predatory attacks.
Reproduction anemones
sexual preference they give the process which is yet another proof that the sea flowers - animals, not plants.However, in adverse conditions, they can use and budding, in which you begin to reminisce about the misleading "actinium - a plant" and the longitudinal or transverse fission.This is especially true of small species.Same gonaktiniya has a habit shared across.Watch this extremely interesting: the first thing grows wreath of tentacles around the circumference of the body, and then it is divided.The upper half is currently the sole grows, the bottom - "the mouth" and another set goad.It is noteworthy that the second division does not wait for the end of the first, so that this kind of actinium can be encircled by several rings of tentacles, heralding the imminent appearance of a few individuals.
Check actinium - an animal or plant - and you can by example.Sea anemones do not regard any person as an enemy, not as prey.So when the human touch simply fold (if they do not pull, of course).We can say hide.And the rest of actinium (picture is show) - very beautiful and interesting creatures, followed by even just curious to watch.
