Observation tells me that the problem we face is not simply a question of quantity but really a question of where the accumulation of these massive drifts of seaweed end up, when the seaweed accumulates in the near shore it overwhelms the beach and all of it's inhabitants, rendering the space difficult if not impossible to navigate and inundating all and sundry in a quagmire of stagnating weeds.
What if it didn't reach the shallow near shore waters? If we could arrest this culprit before it reached the shoreline, would it be such a menace? If we could cause the seaweed to accumulate offshore, would it still be so difficult for marine animals to navigate in, around or through? I don't think so, in deep water the seabed which is so restrictive in the near shore waters is now far below and therefore not depriving marine life of a necessary backdoor as a escape from the bewildering seaweed rafts.
The question now is how do we accomplish this? With the help of our fisherfolk we have to identify the more prevalent currents which act as highways for the seaweed, we see the SW stretched out in long caravans on its way into our bays and onto our beaches, these are the roads we must block if we are to save our beaches. What I am proposing is the building and anchoring of offshore rafts to block the path of incoming seaweed in order for it to accumulate offshore instead of in the near shore waters (beaches, bays, etc.) If we can do this we will solve our first problem and may also solve a secondary problem as well, by forming offshore nurseries for young and juvenile fish of all species.
At this point we may then explore alternatives like a barge to collect seaweed in timed intervals to bring to shore for making compost or other products or even procuring a Sargaboat (a specialised boat for harvesting and transportation of Sargasso seaweed)
Before we get too carried away with what to do with it we first have to construct the mechanism by which we can arrest these floatillas of sargassum.
Construction of the blockade that I'm proposing is relatively simple. A raft on the surface and a net of sorts protruding down to a depth of 10-15 feet to be anchored in waters of a depth greater than 40 feet to allow for sufficient clear water that marine life can still navigate around it. Material choice now presents a slight issue, the easiest and probably most readily available materials like plastic or metal drums to construct the raft will in the end not be the friendliest to our marine environment, a wooden substitute would be better but could be troublesome to acquire and maintain, whatever the medium used for floatation they will have to be connected to form a semiflexible raft to block the seaweed at the surface, once this is done then we need to project our blockade down to the required depth, again materials are the issue at hand, conventional nets will inadvertently capture marine life not intended to be caught so instead I propose using wood or bamboo and rope to create a curtain of sorts to hang from the raft above to further block the path of the seaweed.
Having first identified the path to be blocked and then building the raft all that is left is implementation and maintenance, maintenance being of paramount importance to the success of this project, regular inspections will be necessary not just to check the integrity of the blockade but also to take note of sargassum volumes, especially relative to effectiveness of the structure and possible structure improvements.

by Inquisitive me