There are over a million described animals species in this world. Out of these, about 5 per cent are vertebrates and the remaining are invertebrates. The largest phylum in the animal kingdom is the Arthropoda having 9 lakhs of identified species.
Every student +2, under-graduate and postgraduate courses study animal classification at different occasions. But to obtain the knowledge of animal kingdom, they have to refer boks on both invertebrates and vertebrates. There also, the information will be a available at different places. They cannot get the subject at one point to understand it at a glance.