Colleges in Maharashtra - Other

Hello Sejal,
Admission is through counselling based on the rank obtained in Maharashtra State Common Entrance Test (MHTCET). Vacant seats will be filled by the institute based on the rank obtained in JEE-Mains.
For more information please visit the link below:
https://www.shiksha.com/college/thakur-college-of-engineering-and-technology-kandivali-east-Mumbai-47539/admission

You should have to try another colleges for B.Arch.
Please go through this link below to predict college based on your rank:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=connect&utm_medium=CR_JEECP&utm_campaign=6919840
No, you can not take admission without qualifying NATA .
For more details please go through the link below:
https://www.shiksha.com/architecture-planning/course/b-arch-maratha-vidya-prasarak-samaj-s-college-of-architecture-and-centre-for-design-nashik-23561

There are plenty of colleges which offers Bachelor in Fishery Science. I am listing some of the colleges:
*Annamalai University, Tamilnadu
*Assam Agriculture University, Assam
*Central Agricultural University, Manipur
*college of fisheries, Orissa
*college of fisheries, Punjab
*College of Home Science, Bihar
*Dolphin PG College of Science and Agriculture, Punjab
*Dr Balasaheb Sawant Konkan Krishi Vidyapeeth, Maharashtra and many more.

Yes, after completing your diploma you can apply for Engineering. You will definately get admission in second year of engineering in any college.
Best of luck.