I have hunted, guided, & boated all my life here in Southeast Alaska. I have used a huge gamut of optics over the past 45+ years. I agree, if you can afford it and plan to use them often, then Swarovski, Leica, & Zeiss spotting scopes cannot be beat. To be fair though, those are meant to be used on the ground, not a boat. I have used them on a boat, but only in calm bays for a quick look to verify whether an animal is "huntable" or not. It is not easy to glass something on a beach with them and will frustrate even the most patient person.
As far as binoculars go, those brands are also at the top. However, if your primary use is to "view" wildlife from the boat or the shore at medium ranges (50-800 yards), I would suggest the image stabilized binoculars. I have been using a couple different brands over the last 18+ years. The first set of Fujinon's were amazing. They had a full gimble built in to them (like a marine compass on your dash). You could watch wildlife in a 10' RIB in 2-footers while moving. The downside was they would burn through 4 AA Lithium batteries in 1-2 full days' use. Also, the battery compartment was on the external bottom and was prone to saltwater intake (the optics were waterproof though).
My next brand are the Canon's. These are only stabilized for handshake and light motion - nothing like the Fujinon's. However, I can go several months of heavy use on 2 AA Lithium batteries. They also work very well from the boat, as well as hunting. The optics are medium-class glass, which is fine for normal use. Here's a link to their line:
https://shop.usa.canon.com/shop/en/catalog/image-stabilizer-binoculars
If you want to do photography & video of the wildlife, then get to the shore with a good spotter and a Phoneskope for your cell phone.
FYI - My current optics are:
Swarovski 20-60x ATS 65 HD Spotting Scope
Leica Geovid 10x42 HD-B Rangefinding Binoculars
Canon 18x50 IS All Weather Image Stabilized Binoculars
Canon 10x42 IS All WP Stabilized Binoculars
Canon 8x25 IS All WP Stabilized Binoculars