University of Rhode Island - not balmy, but certainly not Maine - has a marine biology program.
I did a College Board search for marine science and got only 10 results – I don’t think that’s actually the direction OP’s son is hoping to go in anyway.
https://bigfuture.collegeboard.org/college-search?major=2077_Marine%20Sciences
There are 81 results for marine biology:
https://bigfuture.collegeboard.org/college-search?major=903_Marine%20Biology
Honestly, not many big names there beyond the UCs. Check out Rhode Island. It’s on the water, I think, and they brag about all their water activities.