Elasmobranchs. Fishes. Vertebrates Animal Kingdom. Wildlife. Fauna. Zoology.

Fish with cartilaginous skeleton.
Skin covered by dermal denticles.
They have no swim bladder.

Elasmobranchs or condrugs are very archaic fish, with cartilaginous skeleton.
The mouth, in sharks or sharks, is provided with a powerful denture armed with several rows of teeth, which are replaced.

They have highly developed olfactory lobes. Straight tail (two uneven halves).

Internal fertilization; the male has a couple of coupling organs.

They are generally predators and scavengers.

This class of fish is classified into:

• Selacees and
• Holocefals

Elasmobranchs generally have five pairs of eyelet-shaped gills, open to the outside. The lack of opercles that control the entry and exit of water forces these fish to remain in constant motion to force water to penetrate the gills.

The skin is covered with dermal denticles. They have a sensitive organ along the body called the lateral line that allows them to perceive the vibrations of the water and even the taste of their prey.

They have a spiral valve inside the intestine that considerably increases their absorption surface.

The Selacees

There are two types of seláceos: the sharks or pleurotrems or sharks and the batoideos or hypotremas or rays.

The sharks have a fusiform body and pointed snout, highly developed fins with which they can travel at high speed. This group includes sharks, which have powerful teeth. They are very voracious predators, mostly carnivorous and some dangerous for swimmers.

Rays have a flattened or diamond-shaped body or disk. The mouth, nostrils and gill slits are found in the ventral face. The tail of the majority is shaped like a whip and they swim by the wave movement of the pectoral fins. They usually live at quite a depth. Some, like the torpedo, have electrical organs.

Rays are stripes, torpedoes, blankets, sea eagles. etc.

Blanket fish.

The sea devil or blanket is oversized and jumps out of the water.

The torpedo, tremielga or scrapie has electric organs on both sides of the head capable of producing discharges of up to 200 volts.

Holocéfalos

The holocéfalos are elasmobranquios fish of very elongated body with numerous spines, some of them with venomous glands, dangerous for the swimmers, since they are very aggressive.
They have a big head with big eyes and a small mouth, whose teeth are fused into dental plates, which form like a parrot's beak.
They have no spiracle.
The seminal liquid is carried in the form of packages.
The most typical is the chimera.



Other information about fauna in Aragón:

A small list of species in Aragon would be the following:

Vertebrates	Invertebrates
Mammals Red squirrel. Bear. Fox. Artiodactyl Ungulates Deer. Wild pig. Birds Classification of Birds Storks. Capercaillies. Reptiles Amphibians Urodelos.    Marbled Triton.    Webbed Triton.    Pyrenean triton. Anurans. Fishes	Metazoans Arthropods Myriapods Insects Arachnids Spiders Crustaceans Annelids Worm Molluscs Asquelmintos Platelmintos Celentereos Porifera Protozoa
images about the fauna in Aragon.    photographs on invertebrates.    beneficial animals for agriculture.



Auch Aragon genießt eine vielfältige und abwechslungsreiche Natur, in der Pflanzen vorbeigehen, Tiere, Geologie oder Landschaften erreichen wir ein fantastisches Bestiarium, das in seinen Denkmälern lebt.

Die Informationen werden ohne einen Spaziergang durch die drei Provinzen nicht vollständig sein, mit Abschaltungen in einigen seiner spektakulären Landschaften wie Ordesa, der Moncayo, Monegros oder durch Widerspruch den Ebro.

Sie können sich auch den immateriellen widmen: von der Legendenzusammenstellung das gilt auch für das universelle Aragon.