It has no weaknesses elegant fish reptile and insect, so slender that can cortárseles like a thread through certain parts of your body. Is segmented like them, but those segments of below it, well hidden and protected, using them to contract, without which the reptile exposure and the insect to be broken easily.

Like the crustacean, the fish prefer the strength to beauty, and get it deleted the neck. Head and trunk are not just a mass. Admirable principle of force, which makes cutting the water, which is so divisible, have to beat her with great violence, and if you like, a thousand times more than necessary. Then conviértese in a dart, an arrow, the speed of lightning.

The inner bone, which appeared only in cuttlefish and shapeless, here is a great system, but a very multi-unit forcibly, the multiple-elasticity, appropriate to the muscles that contracted, dilated on form the movement. Maravilla, real wonder that structure of the fish, so compact (viewed from outside), and so contractile inside, the hull of flexibilísimas slender ribs (on herring in the shad, etc..), Where muscles are attached motors push to alternative shock. Thus, only exposes the outside auxiliary oars, short little risk air bladder, which, consistent, sharp and slimy, hurt, evade, escape. How is this superior to the octopus or jellyfish, offering worldwide tentacles of flesh soft, tasty snack for the voracious hunger of crustaceans and marsuinos!