Nudibranchs: description, representatives

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2018-03-21 12:41:10

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Nudibranchs – large group of gastropods marine snails. The bulk of these creatures are relatives of regular land slugs. However, nudibranchs differ from the latter by a number of unique morphological features. Based on this, they referred to a particular, individual unit of shellfish, where there are thousands of different types.

Appearance

nudibranchs Glaucus

Nudibranchs morphologically similar to the ordinary garden snails. The base of the miniature inhabitants of the seas and oceans acts as a flat foot, which serves as their means of transportation. In front of the body has a stalk-like growths. At the ends of the latter are tiny, barely visible eyes. These processes also serve to nudibranchs of the olfactory organ.

With regard to the usual snail shell, that golosemennyh no. Their body that looks similar to a sponge, undisguised. Protection from natural enemies in the habitat for most of them is the poison secreted by special cells.

Internal structure

Nudibranchs on the internal structure of the body are divided into several groups: aridity and derided. The representatives of derided have gills located at the rear part of the body. For digestion and filtration of substances entering the body, the liver is responsible large. On the right side from derided a sex hole.

Shellfish group aridity not have these gills. Their replacement is the so-called papillae to provide – elongated appendages, which are arranged in rows on the back of such beings and extract oxygen from the water. The liver, which is responsible for filtering substances from the environment, divided into separate shares. Like the previous group of molluscs, aridity have a sexual hole that is always on the right side. When breeding these creatures for a few moments, touch the bodies, and fertilize gametes.

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Food

nudibranchs of anoles

Representatives of nudibranchs feed on small sea creatures. Their prey are mainly sedentary organisms: sponges, sessile jellyfish, bryozoans, anemones. Among some of the documented cases of cannibalism, especially the eating of the egg-laying of their own kind.

Golosemennye prey by smell. Finding a potential victim, molluscs crawl on top of her, then begin to scrape the soft tissue "radula" – solid float located in the oral cavity.

Habitat

nudibranchs gold lace

Nudibranchs constitute marine animals. Their greatest concentration is in tropical regions. They live on a relatively small depth. However, among golosemennyh there are molluscs that are able to lead an active life in polar waters.

These creatures are reclusive and do not gather in groups. Permanent habitats have not. Over the life of the molluscs are in constant motion, trying to forage for food. However, nudibranchs move very slowly. So they can't move a considerable distance from the place of birth.

Fleece sheets

Let's find out all about holocabana the clam fleece sheet. In fact, today, about this being yet little is known. Externally, the mollusk resembles a glowing ball, which seemed to consist of greenish fur. The body of an animal are special cells, which produce oxygen through photosynthesis. The front part of the slug resembles the head of a tiny lamb, for the creature got its unusual name. Inhabits mollusk fleece sheet runs from the Philippines, Indonesia and Japan.

Glaucus

nudibranchs

Nudibranchs Glaucus looks like a handmade brooch than a sea slug. The sides of its elongated body bluish, you'll a few pairs of branched processes.

This close relative of the snails spend a lot of time at the water surface and doesn't like to sink to the bottom. To maintain the buoyancy of his own body, clam swallows an air bubble.

The Mollusk Glaucus is a toxic substance. Toxic substances it is obtained along with food. Its main prey are jellyfish Portuguese ship, which are known for their extremely venomous tentacles. Moving in the water column, Glaucus is attached to the body of the jellyfish and, as required, separates from it the pieces of flesh that are used as food and material for laying fertilized eggs.

Nudibranchs Golden lace

Will Continue to consider the most unusual representatives of the order golosemennyh. Very interesting creature is a mollusk called Golden lace. In fact, being similar to the segment of lace fabric, which shimmers a bright glow. This kind of snail without a shell not long ago was discovered near the Hawaiian Islands.

Analous

all about the clam holocabana sheep sheet

Nudibranchs of anoles – another quite unusual underwaterbeing. This is a fish lives in deep-water areas at the bottom. Outwardly, it resembles a horned snail, translucent body which are covered with glowing studs. At the distance this tiny hologenic is like exotic flower.

In conclusion

As you can see, there are many varieties of these extraordinary creatures like nudibranches. They all have strange and vivid look. Therefore, they are popular among lovers of aquariums. Actually golosemennye not only are the real adornment of nature, but also accept and participate in the formation of marine ecosystems.


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BE: https://www.tostpost.com/be/adukacyya/5868-galazhabernyya-malyusk-ap-sanne-pradsta-n-k.html

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ES: https://www.tostpost.com/es/la-educaci-n/5874-golozhabernye-moluscos-descripci-n-los-representantes-de.html

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Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

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