Here are several sentences right out of an article on Wikipedia that concerns whirlpools:

Powerful whirlpools have killed unlucky seafarers, but their power tends to be exaggerated by laymen. There are virtually no stories of large ships ever being sucked into a whirlpool. Tales like those by Paul the Deacon, Jules Verne and Edgar Allan Poe are entirely fictional.

By the way, your question isn’t stupid. I actually found it interesting and I learned something new by answering it.

@Bluefreedom thanks!!! i just thought of my dad while i was daydreaming by a river earlier today. LOL. he works in a ship overseas.

@yziabites. You’re welcome. Have a great weekend.

hypothetically, a large enough bubble floating to the surface could cause a ship to disappear downward, were it to appear just below the ship.