This seaweed is a bit of a worry

[Lilith7]

It might be the only solution to introduce something to put back the balance.
These days they do a ton of research and study before just releasing an organism into the environment.
It may also end up being a case where the benefits outweigh the risks

At least they know enough now, to look as far as is possible, for any potential pitfalls.

[nzoomed]

There might not even be any fish that consume it, but not sure what other solutions there would be.
Eradication would be the best option if possible.
I think they had divers putting some type of matting over the weed affected areas which smothers it or something.