The Coelenterates are very primitive organisms and of a great simplicity.
There are more than 4,500 species of very varied forms, they are marine animals and therefore without presence in Aragon.
They have radial symmetry and the body is formed by two layers of cells, one external or ectoderm, which is attached to another inner layer or endoderm, through an intermediate layer jelly-like called mesoglea.
These animals, gelatinous in appearance, are mainly composed of water (90%).
A characteristic of the censorereos is the presence of stinging cells called nematocysts. Celentéreos have two different forms: one fixed, the polyp, and the other mobile, the jellyfish.
The stinging cells of the censorereos, called nematocysts, have a sensitive cilia that, with the slightest rubbing, causes a filament to shoot with great force with numerous thorns with which they inoculate poison, capable of paralyzing small animals.
The celentéreos are divided into the following classes:
Jellyfish spread across all the seas of the world, from the surface to the depths.
The umbrellas they have sometimes have a great color.
The tentacles of some are highly stinging and dangerous for bathers.
Corals and madréporas secrete a limestone skeleton called polyper that is growing continuously, giving rise to huge colonies that form barriers near the
coasts, constituting atolls, banks and coral reefs.
Actinias and anemones live in isolation and sometimes in symbiosis, attached to other marine animals, such as crustaceans, molluscs, etc., and do not have a skeleton.
Ctenophores: They are censorereos of free life.
They don't have stinging cells.
They are transparent and have comb-shaped lamellae that allow them to move when vibrating.
A small list of species in Aragon would be the following:
images about the fauna in Aragon.|
photographs on invertebrates.
beneficial animals for agriculture.
Ebro | Landscape | Monegros | Moncayo | Ordesa
Zh2o | Photografies
Document | Nature in Aragon
The pasapues project is an extension of the Aragón project is like that, and tries to collect and relate all possible types of documentary information about Aragon: texts, books, articles, maps, illustrations, photographs, narrations, etc., and proceed to its publication and diffusion.
Coelenterates. Invertebrates Animal Kingdom. wildlife. fauna. zoology, reproduction, genome, physiology, protozoa, metazoa, celenterates, celentereos, ecology, zoogeography, water, humidity, wetlands, sea, river
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