I grew up in a seaside port and fishing community. 1st thing, what landlubbers think is stinky is not operative here, your thoughts are moo, like the opinion of a sea cow.

The seacoast smells like rotten fish all the time, it's called low tide. The most vibrant sea biomes are shallow coastal waters. The capacity of the North Atlantic, rich with oxygen, to handle fish parts is basically limitless. Hell, you can probably sell this stuff to lobster- and shellfish- men. The quantity here is one whale carcass (yes, that's a mammal, but you get the idea) and whale carcasses happen all the time.

Dump it in the Bay of Fundy, one tide will get rid of all of it. Worrying about the environmental impact of dead fish is like worrying that dumping manure on a field will leave it fallow.

What you are really smelling here is a govt funding boondoggle.