As title suggests: I had a few wobster traps whose wobsters died, off the coast of an island containing a few lureplants. The lureplant bulbs were planted on the island's edge. After a few days I noticed wherever a 'dead fish' item was in the ocean, lureplant eye would spawn. This was fixed when the dead fish item was removed.
Have a wobster die in wobster trap to produce a floating dead fish. Then place lureplant blulbs on edge closest to the wobster trap.