Looking for suggestions for a cruise for a 10 year wedding anniversary!

It is my husband and I's 10 year wedding anniversary so we are doing a trip. We are looking at doing a cruise. This will be our first cruise. We will be going in the first week of August 2026 (dates are not negotiable due to my husbands schedule). Our budget is $2000 total for both of us. It will be just the two of us and he wants to go snorkeling somewhere. Any suggestions would be great!