You can feed sea lions, stingrays and sharks. I think the hours are pretty similar to park hours (ie. I've never tried to buy food and been unable to). Not sure about cost.
I have written posts about feeding the stingrays, sea lions and this one about feeding the killer whales! I’m in San Antonio, but it’s pretty similar costs and experiences. Maybe check it out if you have a minute. Hope it helps. https://www.adventuresinsanantonio.com/orca-tour-seaworld-san-antonio/
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