Hello Aspirant,

Many universities offer M.Sc Zoology and below are few popular institutes:

University of Delhi

Aligarh Muslim University (AMU)

Banaras Hindu University

Jawaharlal Nehru University, New Delhi

Jamia Millia Islamia

Visva Bharati

University of Hyderabad

Pondicherry University

Maulana Azad National Urdu University

Central University of Bihar

Central University of Gujarat

Jadavpur University

Some universities may accept on the basis of UG merit and some may conduct their own entrance or accept scores of state PG entrances,which you can verify from their official website.

https://university.careers360.com/colleges/list-of-zoology-universities-in-india

All the best