Pisces (Lat. Pisces) are ektotermni water vertebrates. There are over 27,000 species of fish, making them the largest group of vertebrates. To navigate serve them even and odd fins. Breathe gills, but their heart has one atrium and one chamber and flows through it reduced blood. They have a small circulation. The most developed part of the brain is the cerebellum. Kičmenica educated and can be Cartilage or hardened. Fertilization is external, a species on the basis of making young people can be oviparous, ovoviviparne and viviparne.
Uploaded: Nov 16, 2016