Underwater-Largeness Phobia

No it's not a technical psychologist approved word, but I have a huge/make me nauseous/pee my pants fear of large objects underwater. Any large object such as the belly of a boat, dock support beams, propellers underwater, boulders or any thing that doesn't belong in water freaks the hell out of me. For example...two summers ago my family + extended family rented a house up in Skaneateles, NY (pronounced Skinny-Atlas) and as any summer lake house there were paddle boats, water trampolines( I was afraid of climbing onto it) and rafts. When paddle boating with my cousin we noticed something white and cylindar-like at the bottom of the lake. I was terrified even looking at it. It freaked me out! The underwater monster ended up being a big piece of PCP pipe. Pretty terrifying huh? As much as I love boating and skiing, I fear getting into the boat or even swimming around a boat. I don't know why or when this ridiculous fear started, but I found out one of my co-workers has the same phobia! Just talking about it made us squirmy!