How do I reinforce my dock pilings with dolphins?

I have a boat dock. about 14 X 26. It's against my seawall, in a tidal, hurricane prone area of FLA> I have piles on the outside. Two of which are very tall. I have a slide mooring system that allows my 42 ft powercat yacht to float up and down with tides. I am concerned that the piles could give way from the mud floor and riip the whole thing away in a good storm. Tidal surge wont be a problem as I have the ability to go about 10-15 ft above normal. I think I need to add dolphins to the existing piles. I see them installed around my neighborhood. Kinda like three shorter piles in a triangle, or pyramid shape attached to the main pile. I think it can be done with water pressure? Any thoughts? Thanx.