star-fish
Like all caladificanicos, the star-fish are marine animals. Your body can be smooth, granular or quite evident thorns, with five hollow tips, called arms. The body is hard and rigid, because their endoskeleton, and can be broken into pieces if treated roughly.
Nevertheless, the animal can bend and rotate the arms when strolling or when your body is in irregular spaces between rocks or other shelters. The star-fish can be between a few centimeters and a diameter of meter (Pycnopodia). These animals move using the retraction and the distension of the tube feet. The breath of the animal if the through gas exchange by tube feet, which would be broadcast call, where the gas and made exchange cell by cell and its reproduction is done mainly through regeneration, that is, if one arm of that animal is cut can develop a new starfish. If reproduction is sexual, the starfish has a larval stage. The starfish have no Aristotle's lantern and so can not chew food. To feed launches the stomach through the mouth, located in oral face at the bottom. It is provided with complete digestive system, and its anus is located at the top; We madreporita soon find a plate, which acts as a scavenger of water necessary for the functioning of Ambulacral or water vascular system.
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