Dear Rushikesh,

There are two colleges in Andhra Pradesh that offer Marine Biology, 

• Andhra University College of Engineering
• Praveenya Institute of Marine Engineering and Maritime Studies

However, for admission in both of them you need to qualify AP EAMCET. Without the exams, it is quite impossible. For further list of colleges in India that provide this course along with their minimu requirement for admission in the colleges, you can visit the link: 

https://engineering.careers360.com/colleges/list-of-marine-engineering-colleges-in-india