Beach metal need help IDing

Found this on a beach across from Patricks Air Force Base Melbourne Fla. first I thought it was an ax head, then I found a hole in the middle and thought maybe a digger, then someone said propellor, then another said impellor, any help would be appreicated

hello Coop748 , welcome to the forum . wow is that thing been in the ocean for a while , it doesn't look very old and is very distorted from the rust and barnacle build up . i'd say your best bet on getting a good idea to just what it is you would need to do some electrolysis on it , other wise your just gonna get alot of speculation. if you do try the electrolysis please post it again as i would love to see just what it is. sorry i couldn't help more .

Dan