Giant? Mucus-like? We're talking considerable blobbage, here:
As sea temperatures have risen in recent decades, enormous sheets of a mucus-like material have begun forming more often, oozing into new regions, and lasting longer, a new Mediterranean Sea study says
Up to 124 miles (200 kilometers) long, the mucilages appear naturally, usually near Mediterranean coasts in summer
124 miles long? Like the dude says, that's a big twinkie.